GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11658272May 1, 2025
ENGINE, POWER TRAIN
While driving down the highway I experienced a sudden lose of power with check engine and other associated warning lights immediately illuminated. It has been confirmed by my independent service center and a GMC dealer that the engine lifters and camshaft failed. I have documentation to prove the vehicle has been traded to a GMC dealer. My safety and the safety of other divers around me was put at risk as I abruptly lost power at highway speeds and this caused traffic around me to slow very quickly and swerve to avoid collision. Serious personal and public injury or death was narrowly avoided due to the quick response of other drivers. I had to limp the vehicle to a safe place to exit the highway and avoid further danger. After speaking with the dealer and my independent maintenance professional I can say that the problem was showing eminent failure, for about a year there was a tik I was hearing that in the past had been described as the "GM TIK" some mechanics said it was normal others said it might be a problem but none of them ever recommended a repair. I believe this is related to the problem reported by my local news agency on 4/30/2025
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658278May 1, 2025
ENGINE, SERVICE BRAKES
6.2L v8 the same as 2021 to 2024 engine built the same way and im experiencing the same issues and the dealership wont fix it , i would like to get a response if this will be included or should i file a lawsuit and take legal action thank you
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657932April 30, 2025
ENGINE AND ENGINE COOLING
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle made an abnormally loud sound and was shaking abnormal. The vehicle lost motive power and failed to restart. No warning light was illuminated. The vehicle was towed to the residence, and the battery was replaced, but the failure persisted. The vehicle was towed to the dealer, who determined that lifter #7 had no compression and that the crankshaft was bent. The vehicle was then towed to an independent mechanic, who also determined that the crankshaft was bent and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 106,000 .
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657998April 30, 2025
ENGINE
My gmc truck was stopped on a red light on a city street and suddenly the engine just shuts off, I have to restart the truck. This is not the first time that it did that. I can't imagine if this does happen on the freeway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11658007April 30, 2025
ENGINE
Trucks engine died going down the interstate no warning lights just died. Had it towed to the GM dealer where they told me the engine failed and the oil pan was full of metal. This was after I spent $5000 at the same dealer repairing it because it wouldn’t start. It’s at Ross downing gmc in Hammond Louisiana now for the 2nd week.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657706April 30, 2025
ENGINE
While driving on the interstate and picking up speed from 50mph, the vehicle suddenly shuts off without any warnings and causing a safety issue of stopping immediately in traffic in the middle of the expressway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657713April 30, 2025
ENGINE
Engine failed while driving on the interstate. No warning lights and no known mechanical issues. Dealership maintained vehicle. Towed to nearest GMC dealership to be inspected and repaired. Tech told me before looking at it that it was probably an engine failure. He disclosed that my model engine was problematic and engine failure was common. He was right. My family could have been killed had I not been able to guide a powerless vehicle off the road out of traffic. A replacement engine was quoted for 15k. However GM did not have any and no eta on when they would. A used engine with 80,000 miles and only a 12,000 miles warranty was offered for 11k. I could afford neither as I’m still paying 1k a month for the vehicle. They are recalling vehicles with the same engine but only back to 2021. I’ve spent over 15k to get my truck back functional. I believe good morning should be held accountable. This known issue was never disclosed to me pre purchase or I would not have paid 80k for a truck to last only 120,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657834April 30, 2025
ENGINE
I was experiencing rough gear shifting jumps and low power/acceleration but it was spotty and not continuous. While I was traveling on cruise control, my truck started misfiring. Once I got home the whole truck was shaking in place. I popped the hood and noticed the engine itself was shaking on the motor mounts. On the way to the mechanic, several lights (including check engine light) came on (the codes thrown were P0300-P0308). The mechanic attempted to clean the fuel injectors (that were replaced 30k miles go due to failure as well), but that did not solve the misfire. I was told the cylinder was dead, and upon inspection of the oil filter there were metal shavings throughout it and the engine, as well as a bent cam shaft. All symptoms and issues I've experience, which resulted in a complete engine swap, are similar to those of the 2021-2024 GMC Sierra 6.2L engines that were just recalled. I would like to know how many other 2019-2020 5.3L engines have had failure before 90k due to similar issues and if there is a larger concern here.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657870April 30, 2025
ENGINE
Engine failure and loss off control resulting in me almost getting into an accident from lifter problem identification from a certified mechanic. Resulting in a $4100 repair
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657415April 29, 2025
POWER TRAIN, UNKNOWN OR OTHER
Bought used 2019 Denali Oct 2024 with 41 k miles on it. 1200 miles later started feeling vibration under load on highway. Took to dealership and they said I needed to replace torque converter. After that the transmission went out during test drive. Then waited 45 days for new transmission to find out the unit was defective. Now we’re going on 5 months and the truck still waiting on a replacement transmission. GM hasn’t acknowledged any of my complaints about this and said that they’re doing the best they can for me and is going to award me 10000 reward points for future use! What a joke! 5. months to replace a transmission? GM has completely failed its consumers, at least this one!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657455April 29, 2025
ENGINE
2019 gmc sierra 5.3L engine had lifters collapse at 81k miles causing internal damage and forcing the dealership to have to replace the engine at my cost-have heard there have been many folks with the same issues
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657583April 29, 2025
ENGINE
Engine issues at 35000 37000and failure at 65000 miles V8 6.2 L engine. Cans and lifters replaced at $6100 GM refused to cover. Car immediately traded in for 2024 Silverado same occurrence on exit ramp 15000 miles engine replaced this year under warranty. Would like recall extended warranty to 2019 or before and be reimbursed for $6100 at a minimum
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657654April 29, 2025
ENGINE
Engine 6.2 liter needed to be replaced. Connecting rod and the engine froze up.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657289April 28, 2025
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM, ENGINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving at an undisclosed speed and approaching a stop, the vehicle lost motive power. There was an abnormal exhaust odor and smoke coming from the exhaust pipe. The engine and fuel lights were illuminated. The vehicle was towed to the local dealer and was diagnosed with a misfire in cylinder #5, and the exhaust lifters and camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657067April 27, 2025
SEATS, ELECTRICAL SYSTEM, STRUCTURE:BODY
Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-NA-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656914April 26, 2025
ENGINE
I was driving back from getting breakfast and the truck started to smoke and the truck just shut off on the street. As soon as the truck shut off, I received an alert on the dash that told me not to exceed a certain speed, but the truck was not moving at the time. I tried to restart the truck and I received another alert that said to put the truck in neutral and I ended up having to push the truck to a safe space. I call a tow truck to take the vehicle to the dealership for evaluation. I later spoke with the representative at the dealership and she told me that my 6.2L V8 engine had seized up. She could not tell me why it happened.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11656725April 25, 2025
ENGINE, FUEL/PROPULSION SYSTEM
While driving My 2019 GMC Sierra I heard a loud Bang And lots of Misfires. The vehicle immediately slowed on its own causing me to pull off the road and endanger myself and traffic around me. Engine light came on and the traction control light was flashing. The Vehicle was brought to Dealer where they Diagnosed the problem all lifter rods were frozen and the cam shaft was cracked. The Dealer has the affected parts.The vehicle was in the repair shop for over two weeks and close to 7,000.00 in repairs.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655759April 21, 2025
VISIBILITY/WIPER
Rear powersliding window leaks on passenger side
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655579April 19, 2025
ENGINE
I do not know if this qualifies as a safety concern, however based on everything I have read, I wanted to report the incident since you have 39 cases already. My 2019 GMC Sierra Denali w 6.2l engine, and 60,000 miles, starting tapping on April 10, 2025. I brought it to the local dealership the following day to diagnose. The dealer reported that they located metal in the oil pan/ filter and said the engine needed to be replaced. After more reading, it seems my truck is one of the vehicles with the 6.2l engine that is failing in countless numbers. In all fairness, I did not crash, the engine did not seize and it did not create a safety hazard in my incident, so i apologize if this reporting is a waste of your time. Now i have been given an invoice for over $10k to replace the engine which is on backorder nationwide I'm told due to the number of engine failures. Obviously it is out of 5 year 60K mile warranty so I have to eat the engine replacement.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11655587April 19, 2025
ELECTRICAL SYSTEM, ENGINE
WHILE TURNING INTO A BUISNESS FROM A HIGHWAY, THE LOW FUEL WARNING CAME ON EVEN THOUGH I HAD JUST FILLED THE TANK. UPON LEAVING THE BUISNESS, I STARTED THE TRUCK AND PUT IT INTO REVERSE AND THE ENGING STALLED. RESTARTED THE TRUCK AND PUT IT INTO REVERSE AGAIN AND IT STALLED AGAIN. RESTARTED AND TRIED GOING FORWARD AND IT RAN FINE. ABOUT 1 MILE DOWN THE ROAD THE LOW FUEL WARNING CAME ON AGAIN AND THE ENGINE STALLED WHILE TRAVELING APPROXIMATELY 35 MPH. AT THIS POINT I REALIZED THAT THE DOORS HAD UNLOCKED AND THE INSTRUMENT CLUSTER GAUGES KEPT SWEEPING UP AND DOWN. I TRIED TO RESTART THE ENGINE BUT IT WOULD NOT TURN OVER. IT ACTED LIKE THE BATTERY WAS DEAD. AFTER WATING SEVERAL SECONDS, I TRIED AGAIN AND THE ENGINE RESTARTED. I NOTED THE BATTERY VOLTAGE IN THE INSTRUMENT CLUSTER AND IT WAS NORMAL. NO WARNING LIGHTS ON IN THE INSTRUMENT CLUSTER. NO DTCS PRESENT WHEN CHECKED WITH A GENERIC SCAN TOOL. MY SAFETY WAS PUT AT RISK BECAUSE THE ENGINE STALLED WHILE DRIVING IN TRAFFIC. I HAVE NOT TAKEN IT TO THE DEALER YET AS THEY ARE NOT OPEN TODAY AND I WANTED TO REPORT THIS WHILE ALL THE DETAILS WERE FRESH ON MY MIND.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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