GMC Complaints

The contact owns a 2017 GMC Sierra 3500. The contact stated while driving 30 MPH, there was smoke and a squealing sound coming from the passenger’s side rear wheel. The vehicle was taken to the residence and the contact observed fluid on the axle tube. The contact stated that the axle as taken apart and the wheel bearings were in pieces. The contact stated that the axle nut had unintendedly backed off. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 25,000.

Dealer keeps ignoring engine knock noise states its normal , mpg is down dramatically . Shift to park , vehicle only has 34k miles and dealer does not want to repair under warranty due to vehicle being a 2021 Battery keeps draining for no reason , new battery added still does the same thing

There is a common lifter failure issue with the 5.3 V8 engine in these vehicles and local mechanics I've spoken too are very aware. The 6.2L was recalled for the same reason. GM would not honor or cover any of this as it was "out of warranty", however, I strongly feel this should be investigated.

I rely heavily on this vehicle for my business and within 1 year of ownership, the vehicle broke down on the highway allowing it to only run @ 30mph. After finally locating a dealer who could evaluate the vehicle in less than 1 week, I was informed that the part was unavailable and they indicated, "it could take 1 month or 3 months to receive." Following multiple conversations, I was forced to open a claim with GM Customer Care. While trying to get information, I was, at one point, told that "although the code indicates failed transmission control module, it doesn't happen all the time and if I wanted to drive it I could come and take it until the part arrives." That really told me alot about how GM representatives view SAFETY while when it happened, I was on Interstate and nearly got trounced by oncoming heavy traffic while pulling an equipment trailer. After the case was handed off to several GM Customer Care Representatives, I finally rec'd feedback including several email updates. I finally rec'd the vehicle back after 1 month and was informed that 1) would receive car payment from GM & 2) would receive additional compensation for lost work time while my vehicle was out of service (Jan 2024). Since that conversation, I did receive 1 car payment however, never heard back from Alisa regarding "lost time". I have sent several emails to customer care asking for an update however, crickets. Furthermore, the car has returned to the shop for another warning to "shift vehicle to park" when it was in park. They told me its a electrical malfunction but they could not get the error to come up on test. I have a photo showing the error.

The engine failed and needs full replacement. Known GM issue with lifters. Engine style 6.2L. We contacted GM and they are not responsive and they provided a claim number. To repair is over 9,000$ and I still owe about 7000$ and the truck was purchased brand new. GM cannot furnish a replacement engine. The dealer showed 34 in stock when ordered. The dealer contacted us later stating GM canceled the order and they do not have an ETA when they can send an engine for the vehicle. We are paying on a vehicle that is stuck at dealer and cannot be repaired.

I was driving and entering the highway the truck lost power and acceleration was very slow, the engine fan runs 100% of the time, the check engine light comes on.

Transmission issue - 2021 Yukon XL broke down 5/6/25 while driving with 2 of our children in the vehicle. the RPMs skyrocketed but the vehicle wouldn't go. was hard shifting and speed would not exceed 35ish MPH. message popped up on vehicle that said acceleration throttled and engine light came on. Took it to dealership and it is a known problem. Transmission needs a valve body replacement. This part is on national backorder for months. Spoke with the dealership on 6/5/25 and they still do not have an ETA. They ordered one on 3/19/25 that still has not arrived. I received a case number from GM but they are extremely unhelpful.

The instrument cluster shorted and was blank with no access to any gauges or speedometer. No functionality

Engine lifters failed. Heard ticking noise first day truck was purchased that gradually got louder but was told by gmc service shop it was normal to hear the ticking noise. Also when cruise control is on and you are decending a hill the rpms raise and you lose engine compression this will cause your speed to drop to around 20 mph and has happened nunerous times.. as well when making a turn sometimes or just driving the vehicle turns off while in motion and you have to coast to the side of the road and turn the key off and back on to start driving agsin.. the loss of power is a complete blackout no dash.. no engine nothing. As result of the lifter issue the engine also hard shifts in and out of slow gears.. I have not driven my truck in about a year and still owe 22k on it. The issues with this vehicle are the same as the recalled 6.3 v8 engines.

On June 1 my 2023 gmc sierra 1500 6.2 began making a grinding and knocking sound on the engine no previous warning or symptoms. I believe it's a problem related to the engine recall so on June 2nd I took my vehicle to the dealership Brown Chevrolet of Eagle Pass TX where I was told that it would be about two weeks for them to get to it.