2019 GMC Sierra 1500

These are unverified consumer reports filed with NHTSA, shown as submitted.

• 12/31/2019· SERVICE BRAKES

  TL* THE CONTACT OWNS A 2019 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 25 MPH AND ATTEMPTING TO BRAKE, THE BRAKE PEDAL TRAVELED ALL THE WAY TO THE FLOORBOARD. ALSO, THE ABS, CHECK ENGINE, BRAKE, AND DIFFERENTIAL WARNING INDICATORS ILLUMINATED. IN ADDITION, THE SERVICE TRAILER BRAKE SYSTEM, SERVICE ESC, STEERING ASSIST REDUCED, DRIVE WITH CARE AND BRAKE SYSTEM FAILURE SYSTEM TOP SPEED 62 MPH MESSAGES APPEARED ON THE MESSAGE BOARD. THE VEHICLE WAS TOWED TO INGERSOLL AUTO OF DANBURY (84 FEDERAL RD, DANBURY, CT 06810). THE SAME DEALER REPAIRED THE VEHICLE ON DECEMBER 28, 2019 PER NHTSA CAMPAIGN NUMBERS: 19V814000 (SEAT BELTS) AND 19V889000 (SERVICE BRAKES, HYDRAULIC, ELECTRONIC STABILITY CONTROL, SERVICE BRAKES). THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 2,606.

• 12/30/2025· ELECTRICAL SYSTEM,SERVICE BRAKES

  THE VEHICLE IS AVAILABLE FOR INSPECTION - 35,000 APPROXIMATE MILES WITH A EBCM MODULE REPAIR NEEDED IN ORDER TO REPAIR IT TO A LEVEL THAT MEETS FEDERAL MOTOR VEHICLE SAFETY STANDARDS OF AT MINIMUM S5.3 NO.126 & S5.1 NO. 135 - I BELIEVE THIS VEHICLE SHOULD HAVE BEEN/SHOULD BE INCLUDED IN THE ORIGINAL AND/OR EXPANDED RECALL N192268091. THE VEHICLES ELECTRONIC BRAKE ASSIST IS NOT WORKING CAUSING IT TO BE DISABLED. IT HAS BEEN INSPECTED BY DENNY MENHOLT GMC. WARNING LAMPS/MESSAGE OCCURRED - DIAGNOSED - REPAIR NEEDED TO MAKE THIS VEHICLE SAFE FOR THE DRIVER, PASSENGER(S) AND OTHERS WHEN THE VEHICLE IS OPERATING.

• 12/30/2024· STEERING

  Incident 12/29/2024 while making a stop at a Stop sign while making a left turn steering wheel broke free with no resistance what so ever??? Turned off the vehicle opened the hood discovered the intermediate steering shafts had separated??? retaining bolt missing causing shafts to slip out of each other, putting my life & passenger's at high risk how this happened there is no explanation to this factory defect.

• 12/30/2019· EXTERIOR LIGHTING

  WHEN BACKING UP IN THE DARK THE BACKUP CAMERA GOES TO FULL BRIGHTNESS AND IS VERY DISORIENTING AND MAKES USING YOU MIRRORS VERY DIFFICULT SINCE YOUR EYES ARE ADJUSTED TO THE DARK. USING THE BACKUP CAMERA SCREEN IS USELESS DUE TO HOW BRIGHT IT IS. HAPPENS WHEN VEHICLE IS STATIONARY OR IN MOTION.

• 12/30/2018· STRUCTURE

  REAR LEFT ROOF IS LEAKING INTO THE INTERIOR OF THE CAB. WATER IS / WAS NOTICED DURING RAIN AND CAR WASH. IN THE ATTACHED PICTURE I HAVE HIGHLIGHTED WERE THE WATER IS COMING INTO THE INSIDE OF THE CAB. WATER CAN ALSO BE SEEN IN THE INSIDE OF THE REAR WINDOW AND ON THE LEATHER OF THE SEATS. THIS HAPPENS WHETHER THE VEHICLE IS PARKED OR DRIVING. IT WAS NOTICED AT 1800 MILES AND ITS LESS THEN A MONTH OLD.

• 12/29/2025· ENGINE

  ECM COMPLETELY FAILED DURING DRIVE NO PREVIOUS WARNINGS

• 12/28/2025· ENGINE

  On November 25th, 2025 I had my wife, kids and baby grandson in my truck driving approx 50 mph when the trailer brake light appeared on my dash. I thought that was strange since I was not pulling a trailer. Shortly after my truck felt like it was going to stall and complete loss of power. I pulled into a turn lane and coasted into a gas station parking lot. I put the truck into park and turned the motor off and then restarted it. The truck was running extremely poor and sounded like it had rocks loose in the motor. I had it towed into an automotive repair facility I have always used and they told me my engine was gone and had to be replaced. I had been told by an oil change company a few weeks before that this engine was under a recall. I checked into it but this model year was not included. I did further research and founded out that this model year was under review. Something needs to be done as I was lucky this was not a busy highway or this could have ended worse.

• 12/27/2024· SUSPENSION

  The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at 10 MPH, the upper control arm and ball joint on the passenger’s side fractured, and the wheel partially detached from the vehicle and was sticking out. The vehicle was towed to an independent mechanic where it was diagnosed and the failure was confirmed; additionally, the driver’s side upper control arm and ball joint were also fractured. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mile was approximately 71,000.

• 12/27/2024· VEHICLE SPEED CONTROL

  The contact owns a 2019 GMC Sierra. The contact stated that while driving on the highway at 40 MPH the vehicle proceeded to jerk and shift into the lower gears, the vehicle's acceleration speed was reduced to 15 MPH. The service parking brake and the ESC light were illuminated. The contact proceeded to drive to their residence, whereupon parking the vehicle the contact proceeded to inspect the vehicle from outside, the contact noted that there was a distinct smell of something burning, and upon inspecting the rims of the vehicle they were very hot. The vehicle was taken to a local dealer where the vehicle was diagnosed the contact was advised that there was nothing to be found wrong with the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 58,000.

• 12/27/2019· SERVICE BRAKES

  NEW TRUCK, GMC 1500 DENALI, 1100 MILES, STARTED VEHICLE WITH MULTIPLE WARNING SOUNDS & WARNING LIGHTS, DASH SAYS "BRAKE SYSTEM FAILURE 62MPH TOP SPEED", SERVICE TRAILER BRAKE SYSTEM", STEERING ASSIST IS REDUCED DRIVE WITH CARE" SERVICE ESC", BRAKING WAS COMPLETELY REDUCED & NEEDED HARD PRESS ON BRAKE TO TRY AND GET VEHICLE TO STOP. VERY DIMINISHED BRAKING. VEHICLE WAS STATIONARY IN A PARKING LOT WHEN THIS HAPPENED ON RESTART.

• 12/26/2018· EXTERIOR LIGHTING,VISIBILITY/WIPER

  WHEN PUT INTO REVERSE, THE SCREEN FROM BACKUP CAMERA IS OVERLY BRIGHT MAKING IT DIFFICULT TO USE THE SIDE MIRRORS AS THE OPERATORS NIGHT VISION IS COMPROMISED.

• 12/24/2025· ELECTRICAL SYSTEM,ENGINE,FUEL/PROPULSION SYSTEM

  I was driving up the road truck cranked up fine started a morning commute, on cruise control the truck instantly out of nowhere lost power completely with no signs of anything and engine won’t attempt to turn over now. I fear the worst has happened which would be catastrophic internal failure for to a faulty engine & its internals.

• 12/24/2025· STRUCTURE

  The lights on the dashboard is indicating that the hood is unlocked and the security system is being tampered with. Hood is closed and it disengage auto start and the alarm goes off every 10 minutes.

• 12/23/2025· ENGINE

  While traveling in high-speed traffic, the vehicle experienced a sudden and catastrophic mechanical engine failure without any prior warning lamps, messages, or symptoms. The failure manifest as a loud, rhythmic ticking and knocking noise immediately followed by a sudden loss of propulsion and severe engine shuddering. Safety Risk: The loss of power occurred in active traffic, creating an immediate crash hazard. Because the engine could no longer maintain speed, I experienced multiple near-miss collisions while attempting to navigate the vehicle to safety. This "limp mode" state placed myself and other motorists at extreme risk of a rear-end or side-impact collision. Component & Inspection: The failed component is the engine (6.2L L87 V8), specifically believed to be a failed lifter or bearing within the Dynamic Fuel Management system. The vehicle and its engine are currently available for inspection. Confirmation: The problem has been confirmed by a certified dealership service center. Diagnostic codes include P0300 (Random Misfire) and P0016. The dealership identified the symptoms as consistent with internal mechanical failure.

• 12/23/2019· SERVICE BRAKES

  AFTER STARTING MY TRUCK I GOT THE FOLLOWING MESSAGES SERVICE ESC SERVICE TRAILER BRAKE BRAKE SYSTEM FAILURE - 62 MPH TOP SPEED STEERING ASSIST REDUCED DRIVE WITH CARE THOUGHT I WOULD JUST LIMP IT HOME ALTHOUGH AFTER LEAVING MY PARKING SPOT I REALIZED THAT I HAD ALMOST NO BRAKES AT A ALL. I RE PARKED THE TRUCK AND HAD IT TOWED TO THE DEALERSHIP WHICH IS TELLING ME THAT THEY RESET THE CODES BUT THAT THERE IS A POSSIBILITY OF IT HAPPENING AGAIN. NO BRAKES AT HIGHWAY SPEEDS WOULD BE DISASTROUS!

• 12/22/2025· ENGINE

  We were driving down a farm to market road at about 50 mph pulling an empty cattle trailer when we had a severe power loss, lots of dash lights and warnings. I noticed white smoke coming from the tail pipe. We limped it back to the house and unhooked the trailer and idled it into the Chevrolet dealership in Portland TX. The dealership just called and they said the #5 cylinder failed, there is metal in the oil and it will need an engine replacement at a cost of over $11,000.00. The truck is a 2019 and has just over 54,000 miles on it. No engine should fail at 54,000 miles and no company should sell one that does. Pulling a loaded trailer at highway speeds with a total engine failure could easily cause death to passengers and livestock. 12122025

• 12/22/2025· POWER TRAIN

  The contact owns a 2019 GMC Sierra 1500. The contact stated that in the first month that the vehicle was purchased, the vehicle intermittently hesitated before slamming into gear hard. No warning lights were illuminated. The vehicle was taken to the dealer, and the contact was informed that the manufacturer was aware of the failure and suggested that a triple fluid flush was needed, and the triple fluid flush was performed. The contact stated that the hard shifting persisted, especially while driving uphill. The vehicle was taken back to the dealer, where it was diagnosed and determined that the torque converter had failed and needed to be replaced. The vehicle was not repaired. The failure persisted, and the vehicle remained at the contact's parents' residence unrepaired. The manufacturer was not notified of the failure. The failure mileage was approximately 57,000.

• 12/22/2024· ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL

  When accelerating it will over rev and then slip and then punch foward I had a diagnostic did and the sensor in the Transmission aren't working properly and then when just driving my etrak also randomly went out and I can no longer active cruise controll

• 12/22/2018· POWER TRAIN,SERVICE BRAKES

  REAR WHEEL BRAKES UNEXPECTEDLY LOCK UP AFTER DRIVING OVER A HOUR OR MORE

• 12/21/2024· POWER TRAIN

  Subject: Potential Issue Related to Recall N202314870 for GMC Sierra 1500 Problem Description: I own a 2019 GMC Sierra AT4 (VIN# [XXX] ) and have identified a potential issue related to the drive shaft. Although my VIN does not appear in the official system as affected by recall N202314870, the vehicle exhibits the following symptoms: 1. Unusual and consistent vibrations in the drivetrain while the vehicle is in motion. 2. Noises coming from both the front and rear differentials. 3. Concern regarding the integrity of the drive shaft, as these issues align with the details described in the recall. Given that this issue potentially affects the safety of the vehicle, I kindly request a review to determine if my unit should be included in recall N202314870 or any other related campaign. I appreciate your consideration of these symptoms for a proper evaluation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

• 12/20/2022· PARKING BRAKE

  The contact owns a 2019 GMC Sierra 1500. The contact stated when he started the vehicle, the parking brake warning light illuminated. The vehicle was taken to the dealer and the computer was updated, but the failure reoccurred. On another occasion, while driving 70 MPH, the parking brake warning light and 4WD warning light illuminated. The vehicle was taken to the dealer again and the contact was informed that the actuator switch needed to be replaced. The vehicle was repaired, but the failure reoccurred. The manufacturer was contacted and stated that the vehicle needed to be diagnosed. The failure mileage was 37,000.

• 12/19/2024· ENGINE

  I have a 2019 gmc sierra 1500 elevation. The dash indicated low oil with 60lbs of oil pressure. I stop park my vehicle and see there is a puddle of oil underneath my truck. It appears to be leaking (extremely high flow rate) from the oil cooler lines where the rubber has given way from the metal crimping. Apparently after calling the dealership and reading online there isn't any type of recal for this issue even tho there is a Customer Satisfaction Program N212326940 implemented for Alaska and Canada due to the cold weather climate causing the failure. I live in western Pennsylvania and currently had a cold snap of 11°F. The dealership wants me to pay out of pocket and take my vehicle in to get diagnosed for service , which also means paying to have it towed to the dealership since it is un-drivable . Then pay for the very obvious service and file to see if I can be potentially reimbursed. This vehicle has less than 70,000 miles on it and is outside of the warranty. However this is a reported common issue online and even through the service department in Zelienople Pennsylvania because the tech. Told me they have the parts in stock because they do alot of them when I was inquiring into the issue.

• 12/19/2019· SERVICE BRAKES

  BRAND NEW TRUCK, AT4, 15K MILES, 5 MONTHS OLD. WAS VERY COLD TODAY OUTSIDE, WAS IN A STORE AND STARTED VEHICLE REMOTELY. CAME OUTSIDE TO A RUNNING VEHICLE, SAT IN DRIVERS SEAT AND PRESSED START BUTTON. NOTICED MULTIPLE WARNING SOUNDS/LIGHTS, DASH READ "BRAKE SYSTEM FAILURE 62MPH TOP SPEED", SERVICE TRAILER BRAKE SYSTEM", STEERING ASSIST IS REDUCED DRIVE WITH CARE" SERVICE ESC". THE ABS, CHECK ENGINE, BRAKE AND TRACTION CONTROL LIGHTS WERE ALSO ILLUMINATED. I IMMEDIATELY CALLED MY LOCAL GMC DEALER (WHO IS 5 MILES AWAY) AND READ THEM ALL THE MESSAGES AND ASKED IF THE VEHICLE WAS SAFE TO DRIVE TO THEIR LOCATION. AFTER A BRIEF HOLD, THE SERVICE TECH STATED THE VEHICLE WAS SAFE TO DRIVE OVER. I ATTEMPTED TO DRIVE THE VEHICLE OUT ONTO RT6. WHILE STILL IN THE PARKING LOT, TRAVELING APPROX 10-15MPH I WAS BARELY ABLE TO STOP THE VEHICLE. IT TOOK MY FULL POWER ON THE PEDDLE TO STOP, AND APPROXIMATE 20-30 FEET OF DISTANCE BEFORE IT STOPPED FULLY. I IMMEDIATELY CALLED THE SERVICE TECH BACK AND INFORMED HER THAT THE VEHICLE WAS NOT SAFE TO DRIVE WITH 5% OR SO BREAK CAPACITY. SHE PROVIDED THE GM NUMBER FOR ROADSIDE ASSISTANCE. THE TRUCK WAS TOWED TO THEIR SHOP A SHORT TIME AGO AND I AM AWAITING THEIR FEEDBACK. ON A SIDE NOTE, I WAITED IN THE TRUCK AS I DID NOT WANT TO SHUT IT DOWN, I WANTED THE SERVICE TECH TO SEE EXACTLY WHAT WAS ON THE SCREEN. AFTER ABOUT 30 MINS, WITH ME IN THE DRIVERS SEAT WITH THE KEYS, THE TRUCK SHUT ITSELF OFF. WHEN IT RESTARTED THE MESSAGES WERE GONE, BUT THE CHECK ENGINE LIGHT REMAINED. LUCKILY I TOOK PHOTOS AND VIDEO RECORDED THIS ISSUE PRIOR TO. THE LOSS OF BRAKES FOR ANY ISSUE SHOULD BE TREATED WITH THE UTTERMOST CARE FOR SAFETY OF THE GENERAL PUBLIC. THIS SEEMLY KNOWN ISSUE WILL (IF NOT ALREADY) RESULT IN INJURY OR DEATH IF NOT CORRECTED QUICKLY.

• 12/19/2019· UNKNOWN OR OTHER

  WHEN YOU REVERSE AT NIGHT TIME...THE BACKUP CAMERA COMES ON AT MAXIMUM BRIGHTNESS AND CANNOT BE DIMMED...BLINDING THE DRIVER

• 12/18/2025· ENGINE

  FOR THE LAST YEAR i BURN BETWEEN 2 - 3 QUARTS OF OILL BETWEEN OIL CHANGES. DEALER KEEPS TELLING ME THIS OS NORMAL. I KNOW IT IS NOT NORMAL AND I'M AFRAID OF ENGING FAILURE WHILE ENGINEERING RECALL IS IN PROCESS

• 12/18/2025· ENGINE

  Main bearing failure

• 12/18/2019· SERVICE BRAKES

  TOOK MY TRUCK FOR A RECALL AT THE GMC DEALER YESTERDAY FOR BOTH SEATBELT TENSIONER AND TO UPDATE THE BRAKE SYSTEM. AFTER THAT EARLIER TODAY AFTER A RED LIGHT I GOT A BUNCH OF WARNING LIGHTS. THE WARNING LIGHTS FOR BRAKE SYSTEM FAILURE, SERVICE ESC, TRACTION CONTROL OFF, AND SERVICE TRAILER BRAKE SYSTEM CAME ON. BRAKES ALL OF A SUDDEN GOT REALLY WEAK ALMOST CRASHED HAD TO BRAKE WAY EARLIER THAN I NEED TO AND DRIVE SLOW. TRUCK WAS RUNNING GREAT UNTIL I GOT THE RECALL DONE.

• 12/17/2025· ENGINE

  GM installed a 2023 6.2L engine in my 2019 GMC. The engine locked up while I was driving it. It had about 54,000 miles on it. There is a recall on the vehicles with the 6.2 GM engines that were made between 2021 and 2024. However since they installed it in my 2019 they are telling me they won't warrant it because the recall just list the vehicle year and not the motor year. This is not right.

• 12/16/2019· ELECTRONIC STABILITY CONTROL (ESC),SERVICE BRAKES

  BRAND NEW 2019 GMC SIERRA AT4, JUST UNDER 14K MILES. UPON STARTING THE TRUCK, THE FOLLOWING WARNINGS CAME ON. "BRAKE SYSTEM FAILURE 62MPH TOP SPEED", SERVICE TRAILER BRAKE SYSTEM", STEERING ASSIST IS REDUCED DRIVE WITH CARE" SERVICE ESC" CHECK ENGINE" I TURNED THE TRICK OFF, OPENED AND CLOSED MY DOOR, THEN RESTARTED. UPON RESTART, EVERYTHING WAS GONE, NO WARNINGS. APPROXIMATELY 1.5 MILES LATER I WAS AT HIGHWAY SPEEDS (70MPH) WHEN ALL THE MESSAGES RETURNED. I ATTEMPTED TO BRAKE BUT THERE WAS NO RESPONSE, PEDAL WENT NEARLY TO THE FLOOR. I ONLY SURVIVED THE INCIDENT BY SHIFTING INTO MANUAL, DOWNSHIFTING TO ENGINE BRAKE, AND STANDING ON THE WHAT I'M GUESSING WAS 5 OR 10 PERCENT BRAKE PEDAL. LUCKILY THERE WAS AN EMPTY LANE FOR ME TO DO THIS IN.

• 12/13/2022· STRUCTURE

  The rear window on the 2019 GMC Sierra SLT leaks water into the cab. This presents a serious concern to the owner of the vehicle because unless you are specifically looking for the leak you may not even know there is one. Upon noticing the leak, one can witness a steady drip of water behind the rear seat, drivers side. My personal concern is that what happens after the water has leaked and had gone unnoticed for an extended period of time, does mold start to grow? Does my truck have mold growing in it? With two young children in the vehicle I am concerned about their health and safety. My frustration with this issue is that GM refuses to acknowledge that there is an issue. My dealer has brought this issue up with GM but the claim has been denied. I have no idea how long the leak has been happening but it’s a manufacturing problem that exists and it certainly shouldn't be the owners responsibility to fix the problem. More importantly, it shouldn't be my young childrens health that is affected by the manufacturers incompetency and ignorance.

• 12/12/2025· POWER TRAIN

  The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly hard downshifted. No warning lights were illuminated. The contact stated that the vehicle was hesitating while driving the rest of the drive. The vehicle was taken to the dealer; however, no cause for the failure was found. The dealer performed an 8-speed transmission fluid and filter replacement. The contact stated that the failure persisted. A month later, the contact stated that on a separate occasion, the transmission unexpectedly downshifted. No warning lights were illuminated. The vehicle was taken to the dealer; however, no cause for the failure was found. The contact stated that the failure persisted. The contact stated that a month later while her husband was driving on the freeway at an undisclosed speed, the engine seized and the rear-end locked and threw the driver into the steering wheel even though the seat belt was securely buckled. The contact stated that the transmission was stuck in drive(D), and the vehicle was unable to move forward. The driver shifted into reverse(R) and was able to pull off the freeway. The contact stated that the vehicle was then driven to an empty parking lot and left overnight. The vehicle was then picked up the following day and was driven to the dealer; however, no cause for the failure was found. The contact stated that the failure persisted. The manufacturer was notified of the failure. The contact hired a GMC engineer to inspect the vehicle and informed the engineer that the vehicle needed to be driven a minimum of three days and 300 miles before experiencing the failure. The contact stated that the engineer drove the vehicle for 100 miles. The contact stated that the GMC engineer and one of the employees at the dealer suggested replacing the PCM module because there was no fault code present during the failure. However, the contact was informed that there was no guarantee that replacing the PCM would fix the vehicle. The failure mileage was approximately 45,000.

• 12/12/2019· SERVICE BRAKES

  RANDOM INTERMITTENT VEHICLE BRAKE FAILURE. I HAVE EXPERIENCED RANDOM BRAKE FAILURE FOR 45 MINUTES AT A TIME ON MY SIERRA. NO CODES OR WARNINGS ARE SHOWN WHEN IT HAPPENS. OCCURS WHILE DRIVING, AND RANDOM. CONDITION CREATES AN EXTREMELY HARD PEDDLE WITH EXTREMELY REDUCED BRAKING POWER. SAFE STOPPING DISTANCE IS INCREASED AT LEAST 3 FOLD. VEHICLE BRAKES WILL START WORKING AGAIN IF TRUCK IS LEFT PARKED AND IGNITION OFF AFTER 30 MINUTES. I BROUGHT THE TRUCK INTO THE SERVICING DEALER, THEY DROVE IT 30 MILES AND A WEEK LATER, GM INSTRUCTED ME TO PICK MY TRUCK BACK UP AFTER NO REPAIRS DO TO THEY COULD NOT DUPLICATE. I EXPRESSED EXTREME CONCERN ABOUT SAFETY, AND GM STANCE IS, "NO CODES NO PROBLEM". I WAS INSTRUCTED BY GM TO SIMPLY BRING IT BACK IN WHEN MY BRAKES FAIL AGAIN. 2 WEEKS LATER, MY BRAKES FAILED AGAIN, CREATING A DANGEROUS SITUATION. ONCE AGAIN, THE TRUCK CORRECTED ITSELF AFTER SITTING WITH THE IGNITION OFF FOR 30 MINUTES. I BROUGHT IT BACK TO THE DEALER, AND THEY DROVE IT AND "COULD NOT DUPLICATE CUSTOMER CONCERN" ONCE AGAIN. ONCE AGAIN I WAS INSTRUCTED TO BRING THE TRUCK BACK IN WHEN THE BRAKES FAIL DURING THEIR OPEN BUSINESS HOURS SO THAT THEY CAN SEE IT FOR THEMSELVES. THIS IS AN EXTREMELY DANGEROUS CONDITION, AND THIS TRUCK SHOULD BE OFF THE ROAD AND CONCERNING TO GM, BUT IT IS NOT. THROUGH RESEARCH, I HAVE FOUND MANY OTHER PEOPLE WITH THE SAME TRUCK YEAR AND MODEL WITH THE SAME PROBLEMS, AND GM IS NEGLIGENT TOWARDS OUR SAFETY AND THE INNOCENT PEOPLE ON THE ROAD. THIS NEW "E-BOOST" BRAKING SYSTEM NEEDS TO BE INVESTIGATED BEFORE MY FAMILY OR OTHERS ARE KILLED OR INJURED BY THIS DEFECTIVE SYSTEM. BRAKE FAILURE OCCURRED BOTH TIMES WHEN ATTEMPTING SLOWING DOWN FOR CURVES AND STOPPED TRAFFIC AT HIGHWAY SPEEDS AND PERSISTED AT ALL CONDITIONS UNTIL IT RESET ITSELF AFTER SITTING OFF FOR 30 MINUTES.

• 12/11/2022· ELECTRICAL SYSTEM

  The rear window defogger is smoking and sizzling. The connection on the passenger side glass that connects the moveable harness for the center glass smokes and sizzles when the rear defogger is on. There is a recall on these vehicles in Canada for this issue. My concern is that it may start a fire. The connector is right behind the right rear passenger seat, imposing a threat to the occupant of that seat. Also, the rear defogger comes on automatically with heated mirrors when remote started. I cannot use remote start, mirror defogger, or rear glass defogger currently due to this defect. I noticed a sizzling sound while driving the truck. I pulled over and began searching. I found smoke being emitted from the connector attached to the rear glass on the passenger side. This is a serious issue. It is a fire hazard. The vehicle could catch fire while driving or while remote engine start has been activated in temperatures lower than 40 degrees. There is a difference in an uncommon electrical short and a known problem. General Motors is aware of this issue and there has not be a notification to owners in the United States nor are there any recalls or suggested repairs. The safety of consumers is in jeopardy with this known problem occurring in multiple lines of their vehicles. Any with a power sliding glass could be affected.

• 12/11/2019· UNKNOWN OR OTHER

  THIS MORNING WHEN I USED THE BACKUP CAMERA IT WAS PERFECTLY FINE. ONCE I GET TO WORK AND STARTED BACKING UP AT A SLIGHT TURN BC I WAS PARKING NEXT TO ANOTHER VEHICLE IT GAVE ME A BLUE SCREEN SAYING 'SERVICE REAR VISION SYSTEM'. IT ALSO DOES THIS WHILE STATIONARY. THIS IS A HIGHLY UNSAFE PROBLEM TO ME, BECAUSE IT DOESN'T ALLOW ME TO OPERATE THE VEHICLE SAFELY PUTTING ME AND OTHERS AT RISK.

• 12/10/2025· STEERING,POWER TRAIN,ELECTRICAL SYSTEM

  The contact owns a 2019 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the vehicle jerked and failed to accelerate as intended while depressing the accelerator pedal. There was an abnormal sound coming from the transmission. The message "Reduced Engine Power” was displayed and the transmission warning light was illuminated. The vehicle was taken to the dealer and the transmission was repaired. The contact stated that the failure persisted. The vehicle was taken back to the dealer, and the transmission was replaced. The contact stated that on a separate occasion, the A/C failed to function as intended. The contact had to drive for fifteen minutes for cold air to come from the A/C vents. The vehicle was taken to Houston Cadillac and the vehicle was repaired. The contact stated that the failure persisted. The dealer diagnosed the vehicle and informed the contact that there was a short circuit. However, no cause for the short circuit failure was found. An unknown repair was done on the vehicle. The contact stated that the failure persisted. The check engine warning light was illuminated. The contact stated that on a separate occasion, there was an abnormal sound coming from the steering wheel. The vehicle was taken to Payne Rio Chrysler Dodge Jeep Ram, where it was diagnosed that one of the bolts found on the steering column was missing and the other bolt was loose. The vehicle was repaired. The contact was informed that the A/C condenser had failed. The vehicle was repaired. The contact stated that the failure persisted. No warning lights were illuminated. The vehicle was taken back to the dealer. The entire A/C assembly was replaced. The contact stated that the failure had occurred soon after the vehicle was purchased. The manufacturer was not notified of the failure. The failure mileage was unknown.

• 12/10/2025· ENGINE

  Just had my 2019 GMC sierra 1500 Denali engine fail. My truck has 75k miles oil changed regularly no codes, issues or dash lights. Recently had it at GMC I Folsom California for a rear window replacement. Full inspection with no issues and nothing found wrong. Sunday 12/7 with my girlfriend and son in the truck about to get on the freeway felt a weird shift as I got on the freeway on-ramp. As I went to accelerate I had my traction control lights come on, lost power, and flashing check engine lights limped the truck off the side of the freeway and exited to a gas station. My truck wasn’t leaking anything and oil pressure was good but it sounds like popcorn was being made in my engine when it was on. Had my truck towed to Folsom GMC and yesterday 12/8 got a call I need a new engine. Called GM corporate to talk to them and opened a claim. GMC dealership got an initial help with 15% of the bill telling me I would need to pay $13,315. Talked to the service advisor and they put in a request for help from GM. Today at 9:00 a.m. they offered 50% coverage and I was able to get a little more but it still has me paying $7,500 and it will be 2-3 weeks to get the repair done. The dealership also will be getting me a loaner vehicle. This dealership has not been great but with this they are trying and doing a lot. However 75k on a truck that does not haul or have heavy use and is 7 years old with no prior issues is crazy. I was told cylinder 8 showed a misfire. Once they opened it up there was damage to the pushrods, valves and lifters with significant metal throughout the motor. I’m still waiting for corporate GMC to get back to me and hoping they will help or offer more money off as this is still a very large bill for a single father of 2 around the holidays. I bought the truck used with about 32k on it in 2022 and have had no mechanical issues or codes related to the motor or transmission.

• 12/10/2020· POWER TRAIN

  WHILE DRIVING THE VEHICLE 21OCT2020 IT STARTED WHINING AND JERKING. I CALLED THE DEALERSHIP TO HAVE IT CHECKED THEY COULDN'T SEE US, SO WE TOOK IT TO A DIFFERENT GMC DEALERSHIP THAT SAID THE CODES HAD NOT BEEN UPDATED, THEY PREFORMED THE RECALL AND SAID IT SHOULD BE FINE. TWO DAYS LATER IT STARTED JERKING AGAIN AND SHUT OFF WHEN STOPPED AT A LIGHT. I TOOK IT TO THE GMC DEALERSHIP WE BOUGHT IT FROM ON THE 28OCT2020 AND I WAS TOLD THAT THE TRUCK WAS FINE, AND THAT THE DIAGNOSTICS SHOWED NO PROBLEMS WHATSOEVER. THE TECH SAID HE WOULD DRIVE IT OUT OF THE BAY, IF BRITTANY WOULD OPEN THE DOOR AND BEFORE HE COULD DRIVE IT THROUGH THE GARAGE BAY AREA AND OUT THE GARAGE BAY DOOR THE TRUCK MADE A CRAZY LOUD NOISE, JERK TO A SUDDEN STOP AND THE TRANSMISSION WENT OUT, AND THE TRUCK WOULD NOT RESTART AT ALL AND HAD TO BE TOWED OUT OF THE BAY DOOR. THE 2019 TRUCK HAS HAD 5 RECALLS FOR SAFETY ISSUES AND WITH 40,000 MILES THE TRANSMISSION WENT ALL THE WAY OUT AND THE TRUCK HAS BEEN SITTING THERE AT THE DEALERSHIP FOR OVER A MONTH WAITING ON THE NEW TRANSMISSION TO COME FROM GMC. I GO IN AND SEE THE TRANSMISSION RECALL ON SO MANY 8 SPEED TRANSMISSION WHICH THIS TRUCK HAS, AND NOW I FEEL LIKE I WAS SOLD A LEMON AND NO ONE SEEMS TO CARE. % RECALLS AND THE TRANSMISSION GOES OUT COMPLETELY AT 40,000 MILES. I AM SO UPSET ABOUT IT THAT I DO NOT EVEN WANT THE TRUCK ANYMORE. IT IS GOING TO RUIN MY RESALE VALUE AND THE LEMON LAW SHOULD APPLY ON A TRUCK ONE YEAR OLD. I HAVE FILED COMPLAINTS WITH THE DEALERSHIP, AND NOW ON THEIR FRONT DOOR IS A SIGN THAT SAYS THEY WILL NOT HONOR THE WARRANTY POLICIES ON ANY VEHICLE THEY SOLD AFTER NOVEMBER 15, 2020. OF COURSE THEY SOLD ME ZURICH EXTENDED WARRANTY TOO, AND I CAN PROMISE I WILL NEVER BUY GMC AGAIN. I ALSO HAVE A 2017 PATHFINDER ALMOST PAID OFF, THAT I AM GIVING TO MY DAUGHTER, AND I WAS GOING TO GET AN GMC ARCADIA BUT NOT A CHANCE NOW.

• 12/10/2019· STEERING,POWER TRAIN,ELECTRONIC STABILITY CONTROL (ESC)

  UPON ACCELERATION MY "SERVICE ESC" INDICATOR LIGHTS CAME ON AND MY BRAKES BECAME NEARLY UNUSABLE AND LOOSE STEERING. I PULLED INTO A GAS STATION AND AFTER 5 MINUTES THE ERROR CLEARED. THIS HAPPENED THE PREVIOUS WEEK AND THE DEALER SAID THEY COULD NOT FIND ANY CODES IN THE COMPUTER.

• 12/10/2018· ELECTRICAL SYSTEM,SERVICE BRAKES

  HAVE ABOUT 6000 MILES ON MY 2019 GMC SEIRRA DENALI 5.3 . I'VE BEEN EXPERIENCING A VERY TROUBLING ISSUE BEEN TO THE DEALERSHIP ONCE ALREADY AND HAD A HARD TIME CONVINCING THEM THAT SOMETHING WAS WRONG WITH THE TRUCK .EVERY TIME I DRIVE FOR LONG PERIODS OF TIME OR IDLE FOR 10+ MINS WHEN I SHIFT FROM PARK TO DRIVE I CANNOT GO FASTER THAN 5 MPH WITHOUT THE REAR BRAKES LOCKING UP. I DO NOT KNOW IF THIS IS SOME KIND OF LIMP MODE OR WHAT .

• 12/09/2024· LATCHES/LOCKS/LINKAGES

  The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 15 MPH and making a right turn, the tailgate erroneously opened causing a metal toy to fall out of the truck bed onto the highway. The toy was run over by a second vehicle causing damages to the front-end of the vehicle and destroying the toy. The cause of the failure was not yet determined. The local dealer and manufacturer were notified of the failure, but no assistance was offered. The contact was informed that the VIN was not included in NHTSA Campaign Number: 24V060000 (LATCHES/LOCKS/LINKAGES). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 72,500.

• 12/06/2025· UNKNOWN OR OTHER

  Experience water leaking 3rd brake light and rear window. Leaking in both areas. Also concerned about mold that could be caused by this.

• 12/05/2025· BACK OVER PREVENTION

  The contact owns a 2019 GMC Sierra 1500. The contact stated that the rearview camera displayed a black screen while the vehicle was in reverse(R). The contact stated that the failure obstructed driving visibility, preventing the driver from safely operating the vehicle. The vehicle was taken to the dealer; however, the contact was informed by the dealer that the part needed for the recall repair was not available. The vehicle was not repaired. The contact stated that the failure persisted. The manufacturer was not notified of the failure. The failure mileage was unknown.

• 12/04/2025· ENGINE

  Engine malfunction, had dealer look at truck and they said I needed a new engine, check engine light came on and a knocking noise appeared suddenly. Reading about 2021+ sierra with 6.2 engine that has a recall with the same problem as mine. Wondering why that recall wasn’t extended to my truck as well.

• 12/02/2025· POWER TRAIN,ENGINE

  Engine failure on 12/1/2025 16,253 miles and 591.9 hours on vehicle. Vehicle has the 6.2l engine. Towed to dealership

• 12/02/2025· ENGINE AND ENGINE COOLING

  The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving approximately 60 MPH, the vehicle started shuddering. The check engine and stabilizer warning lights were occasionally illuminated. The contact pulled over into a nearby gas station, and the vehicle was later towed to a local dealer. The vehicle remained at the local dealer, where it was diagnosed and determined that the engine needed to be replaced. The vehicle was not repaired due to the cost. The local dealer informed the contact that the failure was related to NHTSA Campaign: 25V274000 (Engine and Engine Cooling); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 49,000.

• 12/02/2024· STEERING

  The steering wheel locked up with no warning while driving and truck shuts down and displays no power steering assist service. ERC warning twice in one week.

• 12/02/2019· SERVICE BRAKES,ENGINE

  BRAND NEW TRUCK WITH LESS THAN 1250 MILES ON IT! ABS BRAKES FAILED. FORCED TO DRIVE ON DANGEROUS GRADE DOWN SIERRA NEVADAS WITH VERY LIMITED BRAKING. MESSAGE NOT TO DRIVE OVER 62 MPH. ERROR CODE C0580 ABS BRAKING AND STABILITY SYSTEM, ISSUE WITH ABS AND ERROR CODE P25A2 ECM ENGINE SYSTEM - ENGINE & TRANSMISSION NOT PERFORMING AS EXPECTED. OTHER CODES INCLUDEC2A17, U0100 U026A & U0415. GMC KNOWS ABOUT THE PROBLEM AND THEY HAVE POSSIBLE FIX BUT IS NOT ISSUING A RECALL. DEALER INDICATES REPROGRAMED THE BRAKE SYSTEM CONTROL MODULE.WAR CODE 28YN28687675. CLEARED THE DTC AND ROADTEST. FOUND THE LIGHTS DID NOT COME BACK ON AND THE BRACK SYSTEM IS WORKING OK (JUST "OK") NOW. ALSO, GMC WILL NOT CONFIRM THE PROBLEM WILL NOT REOCCUR AGAIN.

• 12/02/2019· POWER TRAIN,SEAT BELTS,SERVICE BRAKES

  YOU CAN CONSTANTLY FEEL A BUMP,CLUNK & TRANSMISSION SLIP WHEN GOING FROM REVERSE TO DRIVE. THIS IS DANGEROUS AS I WAS PULLING A SMALL BOAT AND IT CAME OFF THE HITCH HITTING THE TRUCKS TAILGATE AND CAUSING DAMAGE TO IT. THIS WILL HAPPEN SECONDS AFTER DRIVE IS ALREADY ENGAGED. AFTER 3RD TIME I TOOK TO DEALER THE MECHANIC GAVE ME A GMC MEMO THAT STATES THAT THIS IS NORMAL FOR THIS MODEL TRUCK TO DO THIS. MECHANIC STATED GM HAS KNOWN ABOUT THIS ISSUE FOR YEARS. ARE YOU KIDDING ME ? SOUNDS LIKE POOR ENGINEERING. I WAS NEVER TOLD THIS WOULD HAPPEN PRE PURCHASE OR I WOULD OF NEVER BOUGHT THE TRUCK. HAVE HAD CONSTANT PROBLEMS WITH THIS TRUCK SINCE I BOUGHT IT. HAVE HAD THE SEAT BELT PILLAR COVER FALL OFF 3 TIMES DEALER SAYS THEY WILL CHANGE SEATBELT, WAITING OVER 2 MONTHS AND NO PARTS OR REPAIR. I HAVE A WARNING TO SERVICE BRAKE PAD SENSOR MONITOR. TOOK TO DEALER AND THEY SAY THEY CAN'T GET PARTS FOR IT YET BECAUSE GM IS ON STRIKE AND HAVE BEEN WAITING FOR PARTS AND REPAIR FOR OVER 2 MONTHS . HAVE HAD A STEERING WHEEL COLUMN WARNING ALSO. DEALER BLAMES EVERYTHING ON SOFTWARE ISSUE. MY DIAGNOSTIC REPORT EACH MONTH STATES TRUCK IS IN PERFECT ORDER EVEN THOUGH I HAVE HAD A WARNING LIGHT FOR OVER 2 MONTHS !!!!! NOW THERE IS A RECALL FOR THE SEATBELT PRETENSIONER THAT IT MIGHT CAUSE A FIRE ! WHAT A PIECE OF JUNK THIS TRUCK IS I TRIED TO SUPPORT THE AMERICAN ECONOMY BY BUYING AN AMERICAN TRUCK AND LOOK WHAT I GET ! I SHOULD OF BOUGHT A TOYOTA TUNDRA !!!!!!!

• 12/01/2025· ENGINE

  The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle hesitated and failed to properly accelerate while the accelerator pedal was depressed. No warning light was illuminated. In addition, the contact was aware of excessive oil consumption and the vehicle was previously taken to a local dealer. An appointment with the same local dealer was scheduled to inspect the vehicle. The vehicle was not yet repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 87,000.

• 12/01/2025· ENGINE

  Engine oil cooler lines leaking from crimp joints. "Oil Pressure Low Turn Vehicle Off" display showed on dashboard. Oil is present all over the bottom of my truck as well as a trail along the road and the parking lot where I parked it. I have not brought it to the dealership yet. There has been a Customer Service Program notice about this issue, I got my truck after the issue was sent out so I did not get the letter or supposedly this truck is not part of it even thought it is the exact issue. Customer Service Program number N212326940.