GMC Sierra Complaints (2019)

729 consumer complaints on file.

#11705636December 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11704789December 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 milea
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11704128December 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11704348December 10, 2025
POWER TRAIN, ELECTRICAL SYSTEM, STEERING
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11703473December 6, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11703310December 5, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11703096December 4, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702502December 2, 2025
ENGINE, POWER TRAIN
Engine failure on 12/1/2025 16,253 miles and 591.9 hours on vehicle. Vehicle has the 6.2l engine. Towed to dealership
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702508December 2, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702171December 1, 2025
ELECTRICAL SYSTEM
My center console wires for the charging pad broke and shorted out causing wires to burn and short the whole system out
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11702210December 1, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11702217December 1, 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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701565November 25, 2025
FUEL SYSTEM, GASOLINE
The contact owns a 2019 GMC Sierra 1500. The contact stated that while driving 62 MPH, the vehicle lost motive power. There was no warning light illuminated. The vehicle was towed to the dealer, where it was diagnosed and determined that the fuel pump module sensor had failed and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 82,000. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701098November 23, 2025
ENGINE, ELECTRICAL SYSTEM
Complete engine failure. I was driving approximately 55 miles an hour, then all of a sudden the cruise control automatically shut off and a series of alarms are triggered. When pressing the accelerator pedal, the engine vibrated excessively in Cleary indicated catastrophic engine failure. I was lucky enough to make it to the nearby dealer who confirmed a complete engine failure. I ended up buying a new vehicle that day to avoid being stranded.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11701023November 22, 2025
ENGINE
Around June 2025 under normal driving my truck displayed engine oil low which I promptly checked the oil to find that it was in range. The light later went off but I still brought it to the dealership to which they could find no issues. From there over the next month or so the truck developed a low end popping sound on start up and at my next oil change at the dealership in August of 25 I asked them to listen to see if they heard it and could recommend a course of action. They reported not hearing anything. On October 19th I had my family in the truck with me and during normal acceleration the engine had a loud pop sound and lost power. Every warning light came on and I pulled over promptly when safe. I had it towed to the dealership and their initial diagnosis was a failure on cylinder 4 with a suspected failure of either the cam shaft or lifter. Given the poor design of the lifter I didn’t want to go back with the OEM lifter so I had it towed to an aftermarket shop. It is there now and they are in the process of tearing down the engine. After watching a video on YouTube I fear my truck is part of the connecting rod bearing failure under PE25-001. My understanding is there is an official investigation into the trucks outside the initial recall. I wanted to submit this for your review as the truck only had 74,000 miles. Freeman GMC in Grapevine, Tx has performed all the maintenance and should have documentation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700926November 21, 2025
ENGINE, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
my engine went out with no lights or warnigns prior to engine going out. Now we still making payments for the truck,expensive truck and we haven't use it because we dont have the money to fix it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700623November 20, 2025
AIR BAGS
The contact owned a 2019 GMC Sierra 3500. The contact stated that while driving during a rain storm at approximately 60 MPH, the vehicle hydroplaned. The contact stated that the vehicle swerved to the right and then to the left. The contact stated that the vehicle drove off the road and down an embankment. The contact stated that he drove over a mound, and the vehicle was launched into the air, and, according to the police report, he traveled approximately 100 feet. The contact stated that the vehicle landed on the front end. The force of the crash had bent the vehicle frame behind the engine. The contact stated that as the vehicle's front end crashed into the ground, his forward momentum sent him into the center console. The contact stated that the center console struck his face and caused lacerations and a bloody nose. The contact stated that the police and emergency services had arrived on scene. The contact stated that a report was written, but he did not have the report number. The contact stated that he had bent the top half of the steering wheel from the force of the crash. The contact was transported to the emergency room. The contact was advised that he had fractured vertebrae between L1 and L3 and had bruised ribs on his right side. The contact stated that the vehicle was towed to an impound lot and later declared a total loss by his insurance provider. The contact stated that none of the front air bags had deployed. The contact stated that the police and the insurance provider confirmed that no air bags had deployed. The manufacturer was informed of the failure. The failure mileage was approximately 103,000.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11700684November 20, 2025
ENGINE, POWER TRAIN
Less then 47 000 miles on truck, Used for only city driving, no off road driving or rigorous travel. - engine malfunction and could have had catastrophic failure while traveling causing injury to myself or others. -Car is inoperable, dealer recommend not to drive it due to safety concerns. -I have metal shavings in the oil, misfires, and a P0011 code. These match the known GM lifter/camshaft failure pattern. Vehicle started skipping check engine light turned on for cam shaft interrupter magnet. GM has open recall for 2021-2025 engine However 2019 vehicle is still under investigation.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700313November 19, 2025
ENGINE
Informant system tells me that the engine oil is low every time right at about 1,000 miles after I change the oil. There have been times where the engine has hesitated to accelerate shortly after receiving the message. I've taken truck to be serviced with no oil leaks found. I purchased this truck with 21,000 miles on it, and it's been doing this ever since I've had it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11700355November 19, 2025
ENGINE
While driving my Sierra AT4, my engine shut off with no previous indication of a problem. The dash simply said to restart the vehicle. Unable to do so, I coasted the vehicle into a parking lot. Once it was diagnosed to be a defective engine, I replaced it with a new GM long block assembly paid out of pocket as the vehicle had 210,000 miles on it and was well out of warranty coverage. The first replacement engine lasted 15,000 miles before developing a spun bearing in the engine. GM did cover replacement of the engine assembly. The 2nd replacement engine was installed 12/2022 and lasted until 2/2025. Same engine seizure problem as the original due to the bearing failures that plague this engine series. Engines have always run 0-w20 Mobil1 synthetic as recommended by GM. Vehicle is currently waiting for GM to make a decision to cover it or not.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to GMC Sierra