2018 GMC SIERRA 1500 Complaints

I was driving down the highway when my vehicle loss control of operation and check engine light came on. After taking it to the GMC dealership it was determined to be a bad lifter in the motor. The garage had to take the motor completely apart to repair a bent rod and cylinder in the motor. There are numerous reports and a pending class action lawsuit concerning this device in the GMC Sierra trucks and other GMC vehicles. The lifters in the cylinder of this motor are designed to switch the engine from V4 to V6 to save on gasoline. My vehicle has been repaired by the GMC garage but I've seen reports of this problem repeatedly happening in these vehicles and it causes me great concern because if there is a lot of traffic in the area I could get hit or cause an accident by not being able to operate the truck. My vehicle is available for inspection upon request. The safety of myself and others is put at risk because the sudden equipment breakdown could cause an accident. The problem was confirmed by the dealer. No other parties have inspected the vehicle. No warning lamps went off prior to this happening and the vehicle is only a 2018 and only has 36,000 miles on it.

The left rear tail light assembly is subject to direct wheel spray resulting in premature corrosion and failure of the lightbulb and wiring harness. Failure first occurred Within 18 months of ownership. I cleaned the contacts and packed the connection with dielectric grease. However after three years the bulb connection is now totally corroded and the circuit has failed requiring harness replacement. The problem is so widespread, replacement wiring harnesses for the left rear tail light assembly are out of stock and unavailable from GM parts. I am now using the vehicle without operating right rear turn signals. GM-trucks.com is an owners chat room with many entries about this problem. [XXX], BSME, P.E. SAE INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

On 2/26/22, approximately 24,000 miles on the vehicle, while traveling on the Interstate a warning popped up in the display that the power steering had failed and to operate the vehicle with caution. Immediately I noticed I had no power steering, and the vehicle was extremely hard to steer. I exited the interstate and turned the vehicle off. I conducted a visual inspection; no issues were immediately apparent. After several minutes I started the vehicle, and the power steering began functioning. I conducted an Internet search and learned this is a common issue for GMC trucks, previously resulting in numerous crashes and over one million vehicles being recalled. NHTSA campaign number: 18V586, GM’s number for the recall 18289. 3/1/22, I contacted GM customer care and was advised my vehicle was not part of the recall. I was advised to take the vehicle to a GM service center, at my cost. 3/1/22, I contacted Mossy GMC of Picayune, MS, and spoke with a technician, who advised the issue is usually due to a drop in voltage and advised me to replace the battery. 3/19/22, replaced the battery. 3/30/22, upon startup the power steering again failed. I turned the vehicle on and off several times, and the power steering began functioning. 3/30/22, went to Mossy of Picayune, spoke with a technician, who advised he was quite familiar with the issue, stating this is a common problem with GMC trucks, he advised to replace the battery. Told him I replaced the battery on 3/19/22, he stated I would likely need to have the steering module reprogrammed, at my expense $130.00, or replace the steering assembly, again at my expense $1,500.00. 4/3/22, while turning the power steering failed, and the vehicle was extremely difficult to steer. I turned the vehicle off and waited several minutes. Upon startup the power steering began functioning. The power steering failure is a MAJOR safety hazard and a recall needs to be issued before someone loses their life.

“Service- trailer brake system” light keeps coming on. It is super repetitive. It comes on about every 30 seconds. It’s a loud beep that lasts quite a few seconds. Eventually, the beeping did not stop until the truck was stopped. Truck was just bought yesterday. Happens at any speed, even when stopped.

Yesterday afternoon I heard a beeping noise that was persistent and it said trailer brake check the same alert showed up today making it impossible to drive safely with the alert popping up every min

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving approximately 35 MPH, the assist brake warning light was illuminated and the contact had to depress the brake pedal to the floor to stop the vehicle. The contact took the vehicle to the local dealer, where it was diagnosed with needing the vacuum pump to be replaced. The vehicle was not repaired but was pending repairs. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 20V603000 (Service Brakes, Hydraulic). The manufacturer had not been informed of the failure. The failure mileage was approximately 37,000.

The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at various speeds, the vehicle experienced shifting while shifting into a lower gear, causing the vehicle to suddenly lurch forward. The cause of the failure was not determined. The local dealer was notified of the failure but no assistance was offered. The manufacturer was not contacted. The failure mileage was 50,000.

The contact owns a 2018 GMC Sierra 1500. The contact stated that the seat belt straps for the rear driver’s and passenger’s side seats would no longer retract and were stuck between the seat cushions. The cause of the failure was not determined however, the local dealer informed the contact that the seat belt retractors were likely defective and would need to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 60,000.

When operating my truck two days ago, I smelled something burning. I then noticed a small plume of white smoke coming from the rear driver's side window area. I then noticed my rear defroster was on, which I shut of right of way. About 30 seconds later, I heard a loud pop and I noticed the rear driver's side portion of the window was shattered. I brought my truck to the dealership and they said they could not figure out what happened. I believe it is tied to a prior recall, but they said my truck was found not to have any issues at that time. I believe there is a direct correlation with the recall issued and what happened a couple of days ago.

Purchased 2018 truck new from dealer on 2/19. Came with 20" rims and the spare tire is on a17"rim. Currently, there is a GM recall # N212346510 and NHTSA campaign #21V985000 for this issue. My truck is not included. Hazard: Based on failure of the anti-lock braking system when operating vehicle with three 20" rims and one 17" spare my vehicle should be include in the recall.