2019 GMC Sierra 1500 complaints

The contact owns a 2019 GMC Sierra 1500. The contact stated that while his wife was driving 25 MPH, the vehicle made an abnormally loud sound and the front driver's side wheel detached. The vehicle came to a complete stop. The vehicle was towed to the dealer, where it was diagnosed that the upper control arm had disconnected from the steering wheel ball joint, and it was determined that the upper control joint, steering wheel column, and front driver's and passenger's side wheel needed to be replaced. The vehicle was not repaired. The contact stated that the vehicle had received an alignment twenty days prior to the failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 70,000.

Right lifter went out & damaged the CAM Shaft which in turn damaged the engine The vehicle has been sitting at the dealership since August 1, 2024 & confirmed on August 9, 2024, stating that a new CAM shaft would need replaced or a new engine, which ever we choose. NOTE: Vehicle only has 40,298 miles on it I was driving to work on August 1, 2024, service engine light came on & was blinking & the breaking system lights came on, this was the only warning that I received.

The engine of the vehicle malfunctioned. The vehicle is available, but however it was taken to a certified dealership to be repaired. My safety and the safety of my three nieces, who were in the vehicle at the time, were put at risk as the vehicle all of a sudden staled in the middle of the Interstate while driving at 75 miles speed rate. The dealership repaired the vehicle by replacing the engine because the camshaft was scored, one of the lifters had failed, and a pushrod was bent. The only warning lamp/message was at the time of stale which read service ESC, Service parking break, and there was a third message but could not remember. I have only had the vehicle for sixteen months. The vehicle was taken in for it regularly scheduled oil changes and tire rotations. There were no issues or warnings prior to the engine replacement which cost me $8623.00.

Rear window leaks in water at the top of the seal

Rear 3rd brake light and rear window are leaking water into the cab causing visibility issues.

Smoke chrome trim package on the front of the vehicle is peeling and is a manufacturer defect, GM is offering no assistance in remedying this problem and is a known problem by gm with vehicles going back as far as 2017

Engine oil cooler line blew apart at factory crimp.

2019 GMC Sierra 1500 SLT. Truck would not start on several occassions. By playing with brake, shift, and steering wheel truck would start again., Also would show warning notices, last one being {engine oil low-add oil}, even right after I just had the oil changed. This last time it would not start I paid to have my mechanic come to me to check it out. He tested a lot and thought it might be the starter so I then had to pay to have it flat-bedded to their garage. What he finally found was a BUNCH of wires worn through in a major wiring harness. It was caused by the wiring harness being next to the steering knuckle and the steering was wearing through the wires exposing bare wires. The mechanic and I see this as a major safety concern and a possible fire hazard. He has told me others have had similer problems . I believe this should definitly be a safety recall for these vehicles. My mechanic states that a new wiring harness olone is about $1500.00 plus a LOT of labor to install it. I do not believe that I should have to pay for a defect in GMC building this truck I have a picture of this mess of wires if you can help me with this. Don't know how to upload the photo I have but would gladly send it to you, Please respond back to this. Thank You Dennis Dorn

The contact owns a 2019 GMC Sierra 1500. The contact stated that on several occasions while driving at various speeds or while the vehicle was parked, the tailgate opened inadvertently. Additionally, the contact stated that the tailgate failed to lock or unlock manually. The vehicle was taken to a dealer where it was diagnosed and determined that unknown parts needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 83,000.

Check Engine Light came on while driving system scan states misfire cylinder 6 but resulted in the lifter being damaged as well as the cam shaft on a vehicle that has 108,000 miles. Prior to this I reported multiple times that it seemed that the transmission would slip and stuttered when on a incline and put in reverse. I was told it was a computer program issue and was charged for a software update which obviously did not fix the issue but ruined the engine.

When starting the truck yesterday, not all the button lights came on and the power steering was no longer operational. I was fortunate the power steering issue did not materialize while the vehicle was in operation on the road. No warning prior to the failure was given by the vehicle.

While making a righthand turn at approximately 10-15 mph, my passenger side front wheel failed at the ball joint and collapsed. Reviewing the carfax, this is the 2nd time this has happened to this vehicle (the first was on the driver side wheel). I noticed Safety Recall Report 21V-718 seems to describe the issue I'm facing with the "front upper control arm experiencing accelerated wear... leading to ball joint separation", but according to GM, since no unsatisfied recalls are shown on my VIN report, there's nothing they're willing to do. I believe the failed part number is 573. This failure left my truck sitting in the middle of the road obviously with no way to move it other than a tow truck dragging it onto his bed.

Driving on the highway coming home from brother in laws house and the truck suddenly popped check engine, brake service and ESC lights came on dashboard while engine power was reduced causing sluggish performance. Made it home and put a scan tool and pulled a cylinder 3 misfire. Replaced spark plug and confirm it’s not an ignition coil problem. Brought to dealer and was confirmed the DOD lifter failed in other words AFM. Overwhelmed and couldn’t do anything but to pay and get truck back to working order told go ahead for replacement of parts for nearly $6k.

The contact owns a 2019 GMC Sierra 1500. The contact stated while making a left turn, the steering wheel was yanked to the left. The contact stated that the "Service ESC and Power Steering" message was displayed. The vehicle was taken to the residence. On another occasion, the following day while making a right turn, the steering wheel was yanked to the right. Additionally, the contact stated that the steering wheel was firm and difficult to turn. The contact stated that a "Service ESC and Power Steering" message was displayed. The vehicle was steered to the side of the road. The vehicle was towed to the residence. The vehicle was not diagnosed or repaired. The contact believed that the failure was associated with NHTSA Campaign Number: 19V889000 (Service Brakes, Hydraulic, Service Brakes, Electronic Stability Control (ESC). The manufacturer was notified of the failure. The failure mileage was 85,502.

GMC of Vacaville California sold me a 2019 GMC Sierra that has a know back window leak issues. I was told by service worker GMC of Vacaville California sold me a 2019 GMC Sierra that has a know back window leak issues. I was told by service worker Brent Lewis/405 that is a common issue and GMC is aware of this issue that the vehicle was brought in before for this same issue prior from [XXX] but was not taken care of. I purchased this vehicle on [XXX] along with a 5k extend warranty that I was told is a bumper to bumper warranty. Come to find out it does not cover a manufacturer defected back window installation. My concern is that they are aware of these issues and water sitting on the inside of the cab due to a leak causes black mold and could cause serious illness to myself and my children. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Unknown. My truck has only about 46,000 miles . We experience heavy rains on the week of 4/8/2024 and I went to go load groceries in the back and saw water coming down the back window. I went straight to the dealer and spoke with Tom a manager at GMC. He took me to service and a mechanic came out and said this a common and expensive job. He said I may need anew window replacement. I left and did research on this problem. There seems to be EVERYONE who has a GMC or Chevy has this problem. Many people are experiencing rust, mold, etc. This is a MAJOR issue. All you hear about mold health isssues. NOT any issue that should be over look. Whenthere is water there IS mold. This issue probably has been going on longer but due to heavy rain and me going in the back I saw water. This is something that dealers need to fix.

Loss of steering multiple times. Very dangerous to try and drive. GMC says shut off vehicle for 20 minutes and try again. Once it worked otherwise it continued to lose power steering, either driving or turning on. I have went into GMC forums and found out there are thousands more people that this has happened to. Thank you for what you people do.

My tailgate has been unlatching while driving and I do not understand why. It came down while I had my trailer attached and it damaged the tailgate. No one is touching the button that unlatches the tailgate and it is closed when I start driving, but sometime before I arrive to the next destination it's miraculously down. This is very dangerous and I would like help getting it taken care of

The contact owns a 2019 GMC Sierra 1500. The contact stated that upon inspection, it was discovered that the coating on the exterior frame of the vehicle had peeled off and the frame started rusting. The local dealer was notified of the failure, but no assistance was offered. The contact was informed of a TSB for the failure, but the VIN was not included in the Extended Warranty Coverage. The failure mileage was 25,000.

Lifter cam failure. Twice

While driving down a road in the moring hours, lost complete power and Truck shutdown. Thank God, I was able to pull off the road,since it was a Sunday Moring. Truck was not able to restart. If this had happened on a busy interstate. My wife and I could have been hurt or killed. Had the truck towed to dealer. Replaced the Transfer Case Module. Still don't know if what they put in truck was correct since mine was different than what was shown on computer specifications.

There is an issue with the drivers door locking mechanism. Something between the electrical and the mechanical components that lock and unlocks the door keeps breaking. So far you can always unlock the door manually by pulling the door handle but it sporadically will not lock or unlock by the remote or push button. Also it doesn’t always lock when put into drive like the rest of the doors do.

Complete system failure while driving. Lost control of vehicle, no breaks. Had it brought to dealership. Lifter failure and bent rod, top engine failure which caused everything to malfunction. Vehicle has 88K miles on it. This is a defect. We had taken it in for the ticking problem in the past and they did nothing for us. Everything is documented. We are afraid that bottom half of engine was compromised. Do not feel safe driving this vehicle anymore. I do not want it to blow or lose control of vehicle again. This is a known issue and must be addressed. There was a service bulletin put out for my engine and there is an exact part by part that needs to be replaced, however GM is unwilling to listen to us at this time. Please look into this because this will happen to more and more consumers. This is very scary. What is the cost of a life?

Engine oil cooler line crimp connections are not properly crimped and leaking oil whether the truck is operating or sitting off. It also appears the flare or threaded connection has failed. I went to the GM dealership who said my truck wasn’t part of the recall but my lines are very clearly the same affected parts and would not be available for repair under the recall. I suspect there are other trucks like mine that were missed in the initial recall. I had the lines inspected at another repair shop but all the GM oil cooler lines were unavailable and no back order was permitted. There have been no warning lights for low oil pressure yet but the worst level I have seen so far was only 3 of 8 in quarts in the oil pan. I’m afraid of the lines blowing out on the road and causing a total uncontrollable engine failure and oil slick for other drivers.

Purchased a brand new from dealer 2019 GMC Sierra 1500 in July 2019. I noticed not long after that time that the back window leaked once in a while when it rained. I live in Phoenix Arizona, so rain is a rare occurance and it is in the back seat area of the truck where I do not sit back there or look back there very often checking for leaks. I mentioned it to the service advisor when I was trying to get a very long running issue with the tire pressure monitors that they would not properly fix. It took nearly 2 years for them to correct that issue, and by the time they fixed that issue, truck was out of warranty and they said they had no record of this problem and they could not fix. I am worried about the water causing mold or rust up under the head liner that would cause me and my family medical issues. Water, metal amd fabric head liners do not mix and there is a water stain on the roof liner that grows every time it rains. This is a medical issue and nobody should have to wonder what is growing above their head inside their vehicle while going to work. I see many online reports of a cracked window frame on these model year trucks, so it seems to be a widespread problem with either their vendor for these windows or the installation process at the factory.

The contact owns a 2019 GMC Sierra 1500. The contact stated that while the vehicle was parked, the shift to park message was displayed. After turning off the vehicle, there was an abnormal beeping sound heard. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 86,018.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 45 MPH, the service brakes were inoperable, and the vehicle experienced phantom braking. The vehicle came to a complete stop on the highway. The vehicle was towed to an independent mechanic however, the failure could not be duplicated. The contact called and made the dealer aware of the failure. The contact stated that the failure was intermittent. Additionally, the speed odometer was inoperable. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 70,000.

Electrical short on brake booster performance error code c0021 while operating vehicle . Brake pedal became stiff and higher than where I had it . Vehicle making hissing noises and will no longer start due to this error. Safety concern this is not part of a recall list. I nearly crashed. I had to utilize emergency brake.

I put my truck in break. Service mode to replace the brake pads. I began changing the pads And could not get the piston to retract all the way, I hooked uon a c clamp to retract the piston. In the event i moved the rotor to another spot and the brake service mode turned off and the piston extended. My fingers nearly got caught in the caliper. When put in brake service mode, it should not automatically extend when turning the rotor. Someone will get hurt bad at some point in a swrvice garage or at home when wirking on brakes.

Rear window is leaking water inside cab and may cause mold

The frame of the rear window cracked which allowed water to enter the cab. Water made its way onto the rear anchor strap of a car seat and saturated it which could have caused it to possibly not perform properly, which could have injured a child. Since the rear window can be opened electrically it is possible that a short could occur due to the water intrusion. GM has a service bulletin out about resealing the window but will not cover the repair or replacement of the window if it is outside the 36,000 mile warranty period. Obviously this is a manufacturer defect that has numerous occurrences or there would not be a bulletin created for it.

There is a water leak coming into the back cab of my 2019 GMC Sierra. My truck smells horrible the dealership can't find the leak. It smells very moldy and very concern for my children riding in the back breathing the unsafe air.

With only 89K miles on my vehicle I’m having to replace 13K dollars worth of parts due to a known issue with the 5.3L V8 engine with the AFM DOD system that GM hasn’t fixed and refuses to help cover the cost cause I’m outside my warranty. I feel they need to extend the warranty miles and time frame due to the common occurrence of this issue

Question #1- “Service Trailer Brake System”-“Steering Assist is Reduced Drive with Care”-Brake System Failure 43 MPH Top Speed”-“Service ESC” Question #2- I experienced a Complete loss of braking ability, myself, a friend and, a coworker, as well as the properties around me where placed at risk. Question #3 Not yet I am having towed to the dealer today. Question #4 Not yet the vehicle will be towed to the dealer where I purchased it today. Question #5 Not my knowledge I do not recall any warning lights.

I have had frint driver and passenger ball joints go out 3 times all together.

The torque converter of transmission went out on my 2019 GMC Sierra 1500 Denali with only 62072 miles. My safety has been put at risk daily, from intermittent shuddering and loss of power. My vehicle underwent a multi point inspection at Earnhardt Buick GMC confirming I will need a complete transmission assembly estimated to be around $7100. There were no indications or dash lights, the only reason I brought it in is from hard shifts, and intermittent shuddering.

The rear window is leaking severely. It seem to be an ongoing issue with these trucks at the rear brake light spoiler. It’s a substantial amount of water and there is water damage and mold.

Engine Oil Cooler Line detached from Crip fitting. Vehicle: 2019 Sierra 1500 powered with 6.2L L87. GM has a published policy for a specific 530 vehicles, GM Claims my VIN was not covered hence no recall police "Customer Satisfaction Program N212326940" letter was released for subject VIN. It's clear, this issue exists beyond the scope of 530 vehicles. No know warnings existed prior to the incident. Vehicle has been repaired at owners expense and not supported by GM.

The contact owns a 2019 GMC Sierra 1500. The contact stated while her husband was driving at an undisclosed speed with her in the front passenger seat, he noticed that the vehicle in front of his had stopped. The contact stated that her husband immediately depressed the brake pedal, causing the vehicle to forcefully stop. The contact stated that the front passenger's side seat belt pretensioner failed to retract, causing her to hit the back of her head against the headrest. The contact stated that she sustained neck injuries but did not seek medical attention. The vehicle was taken to the local dealer, where it was diagnosed, but the failure could not be determined. The vehicle was not repaired. The contact stated that the failure had been recurring. The manufacturer was not notified of the failure. The failure mileage was 73,833.

Water getting in cab

The lifter valves for the dynamic fuel management system have failed twice resulting in an immediate loss of power, rough driving, and low speed. To replace the first time, it cost $3500 at a mechanic. The 2nd time that it happened (8 months later), we now have to have the engine replaced and it cost almost $10,000. GM has refused to take any ownership in these faulty lift valves and someone is going to lose control of their vehicle when this occurs.

2019 GMC Sierra 1500 Limited transmission problems could include shifting delays, grinding when accelerating, the car shaking on the road

When shifting to Park the vehicle shuts down but message comes up to Shift to Park and electronics stay on. Vehicle is off but unable to exit vehicle and lock it since the Shift to Park messages keeps dinging.

The contact owns a 2019 GMC Sierra 1500. The contact stated while driving 25 mph, the oil pressure low/turn vehicle off warning light was illuminated. The contact was able to park the vehicle at a near parking lot. The contact exited the vehicle and hear an abnormal noise exiting under the vehicle and saw an oil leak. The contact stated her father-in-law came to the location to add oil but the vehicle keep leaking. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with the engine cooler line needed to be replaced. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 84,000.

Transmission has created shuttering at speed and jarring total stop decelerating from 2nd into 1st gear. Beyond the transmission this vehicle completely stopped and lost power at 55 mph due to faulty valve lifters and pitted cam lobe. These were two separate incidents. Transmission cause lose of power on incline. Valve lifters cause lose of power at high speeds. The dash board read outs no longer worked and I was on a Highway without the ability to maintain speed.

What happened: the air bags failed to deploy during a crash. Question: What component or system failed or malfunctioned? Answer: air bags, automatic emergency braking, forward collision warning. Question: Is it available for inspection upon request? Answer: yes Question: How was your safety or the safety of others put at risk? Answer: driver-side air bags failed to deploy upon a rear-end collision with the vehicle to my immediate front @ 40 mph. Question: Has the problem been reproduced or confirmed by a dealer or independent service center? Answer: No. It currently is at a repair facility as of this morning and it’s apparent that the air bags did not deploy. Question: Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Answer: No, and not to my knowledge since turning the vehicle into the repair facility this morning. Question: Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Answer: None. No previous warning lamps, messages, or symptoms. *NOTE: I have dash cam video of the collision in my possession.

The transmission causes the vehicle to shudder, lurch from a stop, at times it won't move forward (from a stoplight etc), it won't reverse other times. When driving down a freeway, the transmission allows the engine RPM to surge wildly as if I had put it in neutral and pressed the accelerator. This started at 85k miles approximately. It's into 90k now. The transmission had to be replaced at a cost of $6000

Were driving and vehicle repeatedly suddenly braked in the middle of interstate or highway without any warning. We are so traumatized, and scared of this vehicle. It has happened before. Dealership says there is nothing they can do. This could have caused our life. GMC should be held accountable.

Oil cooler line detached from crimp while driving at highway speeds forcing the vehicle to an emergency stop on the side of the road. All oil pressure was lost immediately and entire underside of vehicle including tires, brakes, and wheels were all coated in oil. Known issue for same year, make, and model that has already been listed from NHTSA. But, apparently this VIN was not in the affected range.

The contact owned a 2019 GMC Sierra 1500. The contact stated while driving 60 MPH, the A/C stopped working. Additionally, the contact smelled an electrical wiring burning odor. There was no warning light illuminated. The contact then noticed smoke coming from under the glove compartment. The contact stated that he pulled to a carwash and exited the vehicle. An explosion occurred under the hood and the vehicle caught on fire. The contact stated that the vehicle burned significantly. The contact was able to extinguish the fire with the assistance of the fire department. A police report was filed. A fire department report was filed. There was no injury sustained. The vehicle was towed to a tow yard, where it was totaled. The dealer was notified of the failure. The manufacturer was not notified of the failure. The failure mileage was 49,653.