2018 GMC Sierra owner complaints

After cold starts when accelerating the transmission slips from 1st to 2nd and throws your body forward. After that first gear change it doesn't do it again until another cold start. Around 34000 miles I am getting a rumbling vibration through the dash and steering wheel when holding speed between 35-75 MPH. The RPM guage will jump slightly and it will feel like going over rumble strips. Acceleration is very weak at times. Sometimes its ok. There has to be something done with these torque converters and transmissions by gm. Unacceptable for a 40-50k dollar truck!

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving at an undisclosed speed, the engine temperature rose to 210 degrees and the vehicle started jerking. The contact stated that the failure also occurred while idling for a while, or while stopped at a traffic light while refueling, and before accelerating. The failure occurred once the engine temperature rose to 210 degrees. There were no warning lights illuminated. The vehicle was taken to a certified mechanic at a transmission shop who confirmed there was a failure with the transmission; however, the mechanic was unable to determine the cause of the failure. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was 117,000

I own a GMC sierra which is 14 months old, purchased in dubai uae from alghandi auto. The last service for 40000 kms was done on august 8th, 2019 and no problem was highlighted except the battery that was subsequently changed. On friday early morning (sep 27, 2019), we have escaped a major accident on sheikh zayed road on account of the front wheel axle that just broke/came apart while driving, causing the front right wheel to detach from the vehicle, subsequently skidding to the right causing major damage to the suspension and many other parts in the vehicle. This could have caused even death of my son who was driving the vehicle. I would appreciate an immediate call from your office to resolve this as I am no longer interested in driving this car that can cost me & my family our liv

The contact owns a 2018 GMC Sierra 1500. The contact stated while driving 50 MPH, the vehicle started shaking and vibrating abnormally. There was no warning light illuminated. The vehicle was taken to the dealer to be diagnosed. The contact was informed that the transmission oil needed to be flushed. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was 71,000.

I have 125,000 miles on my truck. I was traveling with my grandkids in the back seat. We were going through a four way stop. My truck started tapping like a lifter issue. The next thing I know is the truck engine light started flashing and car started to shake. Then, my truck lost all power and a big cloud of blue smoke came out of the tail pipe. The truck could not be driven any further. The symptoms: engine tapping, low oil, engine light flashing, shaking, lost all movement, and a cloud of smoke We had to tow my truck to the dealer and they are still accessing the issue. All symptoms are identical to the current recall of the GMC engines.

During down shifting in lower gears while reducing speed , transmission makes a loud noise followed by vehicle hard lounging forward . Occurance is intermittent and unpredictable . In city traffic this has potential to cause an accident because vehicle lounges forward when speed is reduced . Vehicle has 18900 miles . Made in 2017 .

I have had my truck in the shop several time for the rear springs they finally replaced the springs and I am having trouble again my warranty is out but I took it to see if gm would take care of the problem but they don’t seem to want to do anything and I no my vehicle is not the only one that has had this issue

Sunroof shattered while driving on the interstate

Driver Assist-Lane Keeping Assist-Forward Collision Warning-Automatic Emergency Breaking Life Threatening When System Fails and is Intermittent . Vehicle has been said to be dangerous to drive by GM Tech/Can cause life threatening conditions. Fault has been confirmed by Dealership. WARNING LAMP> "SERVICE DRIVER ASSIST SYSTEM" Friday 3 December 2021 at approximately 21340 miles.

I have had my GMC sierra 1500 for almost 3 years. I have a little under 59,000 miles on the truck. A few thousand miles ago a tech at the gm dealer let me know that they had to add some coolant and it was something I should keep an eye on. I brought the vehicle back to have them look into it. They let me know that the radiator has a small leak. It is not big enough to have fluid hit the ground in my garage but it is loosing fluid. I looked online and saw that this is a common issue. I was told that it was not covered under warranty and it would cost a good amount to fix. I have had this vehicle for under 3 years and have had 5 issues without any of them being covered by warranty. This vehicle seems to be a lemon.

This vehicle has 88400 miles, it out of warranty, which I know this, I use amsoil asm sig series syn SAE 0w-20 , 5.3l gas. Two years ago, I changed oil at richard Buick GMC in dayton, oh and sent a sample of the oil to oil analyzers for an analysis, they set it back, it showed there was a level 4 severe gasoline in the oil. They changed the high speep fule pump, both in jectors, and it thought it was fixed, on 12 - 11 -24 had the oil changed at local boys service center, sent a sample of the oil-to-oil analyzers and recieved back, a severe fuel leak of gasoline in the oil, I don't think that many drivers who have this vehicle know about this dangerous problem, it could cause an engine failure or even worse, general motors needs to fix this perblem.

Tl* the contact owns a 2018 GMC sierra 1500. The contact stated that while driving at various speeds, the temperature gauge indicated that the vehicle was overheated. No warning light was illuminated. The vehicle was taken to beck & masten Buick GMC north (11300 fm 1960 west, houston, tx 77065, (877) 380-8433) where it was diagnosed and determined that the radiator was leaking coolant and that the radiator needed to be replaced. Coolant was refilled in the vehicle. The dealer contacted the manufacturer for assistance with repairs. The failure mileage was approximately 47,000.

I purchased my 2018 GMC Sierra 1500 pickup truck new in 2018. To date it only has 28K miles on it. I have never used the trailer breaking system that it came equipped with. On 12/24/22 we were traveling to a family function for Christmas. The "service trailer break system" warning message came on and the chime chimed continuously until I got to my destination, about an hour away. This chime was very distracting and there was no way to turn it off. After arriving at my destination I turned the truck off hoping it was just a fluke. When I started the truck back up the "service trailer break system" warning light and chime continued. It continued for an hour on my way home. Again, this was very distracting and I was unable to focus 100% of my attention on the road and my driving. Thank fully

My vehicle is hacked anytime I am driving the vehicle I am not in full control. The vehicle steers itself left or right while driving, the brakes are always on while driving sometimes braking harder but always on. The infotainment system has many glitches. This vehicle has been back to the dealership more than 15 times has been out of service over 35 days gm even flew a engineer/tech to inspect the vehicle and says they couldnt find anything. Therefore this vehicle is hacked there are so many issues and glitches and the fact that the truck only acts like this when I am driving no one else. Like it can be turned on and off instantly. I have tons of videos pictures and supporting documents backing this. I need help this is a serious issue and there is so much more to it than I can type here

The contact owns a 2018 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the air conditioning system became inoperable. There was no warning light illuminated. The contact stated that the air conditioning system failed to function properly. The vehicle was taken to an independent mechanic, where it was diagnosed, and determined that the air conditioning condenser had failed and needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was not available.

I purchased this 2018 GMC pickup in May 2021. Starting in Nov 2022 I started getting a sporadic SERVICE TRAILER BRAKE SYSTEM warning light and chime. I have never towed a trailer using this trailer brake system on the vehicle, but the warnings come on sporadically. I have done some research and found this is not an isolated case as others have reported the same problem. Some owners have replaced the dashboard controller at their own expense, however this is now a well documented problem that goes beyond an isolated case. This is a defect of the trailer brake controller and should be recalled by GM at GM expense. It is a hazard to driving when the visual and audible chime come on sporadically. It's a distraction to safe driving and requires immediate intervention. I did advise my lo

Vehicle violently shakes at all speeds. Dealer blamed tires, I had new tires installed, still shaking. Dealer says "no problem found, operating as designed" truck is a nuisance to drive, shaking badly

The factory wheels do not grip the road. This was from day 1 of getting it brand new from the dealer. This has LED to spinning the tires, fishtailing, and sliding while braking. This happens with even moderate amounts of pushing the gas pedal or braking well ahead of a slow down or stop in traffic in front of you. This is very dangerous and takes away the drivers ability to maneuver as we should.

The truck was being turned on to resume driving after brief stop. The vehicle engine turned on but vehicle steering locked, front and rear exterior lights went out. After truck turned off for 20 minutes. The steering wheel unlocked, the exterior lights turned back on. I called GMC roadside services-!they recommended towing vehicle to dealership.

The sunroof in the 2018 GMC sierra exploded outward of the vehicle, dropping glass shards into the cabin. The vehicle was in motion at about 15 MPH in a neighboorhood street with no overhanging objects that may have contacted the glass. The weather foreceast for the day was sunny with a high of 76 degree fahrenheit. No external contact was made to the sunroof glass prioir to the incident. No investigation was desired by both the local dealership or general motors on the incident itself. Both have directed me to making an insurance claim to rectify the situation.