GMC Complaints

Went to store bought food Left store and car started chugging and losing power When I got home my son said he could smell exhaust and it sounds like the catalytic converter

In March 2025 my 2019 Arcadia with only 44112 miles begin indicating a Shift to Park error message when I parked and shifted into park the error message showed on the instrument panel and the warning alarm sounded and would not stop showing the error message until I restarted the car and shifted from drive to park repeatedly. I couldn’t get out and close the door, and the warning stop, it would continue to sound the warning. The only way to stop the warning message and alarm was to stay in the car and repeatedly start the car shift to drive into park switch it off and if it still showed the error and warning, do it all over again. This could take up to several minutes and many tries. If I had of left the car all the warning would have been sounding indicating it wasn't in park. I didn't know if it was really in park or not and if not, the car could have potentially rolled off causing injury or damage. To try and determine what was the cause of this problem I searched the internet to find a solution, to do a reset or simple fix and discovered that GMC had known about this issue since 2016 and the only solution was an in the shop repair requiring replacement of some parts. The "Shift to Park" error in GMC vehicles is considered a safety issue by many owners and has led to class-action lawsuits. The issue, which prevents vehicles from recognizing when they are in park, can lead to the engine not shutting off, potential for vehicle roll away, and even entrapment inside the vehicle. On April 16, 2025 I had the repair done at Hayward Allen, Cadillac – GMC dealership, 2590 Atlanta Highway, Athens Georgia 30604. The total repair cost was $732.36 (invoice attached). ). I sent a copy of this invoice by email to GMC customer service. After customer service reviewed the amount they call and informed me they could only reimburse me a total of $73.24.

1. Lane Keeping Assistantance: The green vehicle indicator on the dashboard will disappear and stay off while driving. When it is off, it is unsafe. 2. Parking Collision Warning: The front and back sensors will disappear and become nonfunctional while driving and parking. Sometimes they activate for no reason as well. 3. Both exterior mirrors: After starting the engine to drive off , both exterior mirrors will lower automatically from my setting. After the truck is started and driven off, they must be rest again.

What component or system failed or malfunctioned, and is it available for inspection upon request? The valvetrain system failed due to broken rocker arms, which resulted in additional internal engine damage. This failure occurred under normal driving conditions. The affected components have not yet been discarded and are available for inspection upon request.How was your safety or the safety of others put at risk? The failure caused sudden engine misfiring and knocking, reducing engine power while I was operating the vehicle. This significantly compromised acceleration and response time, especially during merging and lane changes, which could have led to an accident. Any unexpected loss of power or engine instability at highway speeds poses a serious risk to myself, passengers, and other motorists.Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The issue has been diagnosed and confirmed by an independent certified mechanic, who verified the broken rocker arms and resulting engine damage during inspection.Has the vehicle or component been inspected by the manufacturer, police, insurance representatives, or others? The vehicle has not yet been inspected by the manufacturer, police, or insurance representatives. Only a certified independent mechanic has inspected the failure thus far.Were there any warning lamps, messages, or other symptoms of the problem prior to the failure, and when did they first appear? Yes. The check engine light appeared and the engine began running rough and producing a knocking sound. These symptoms occurred just prior to the confirmed failure and prompted me to stop driving the vehicle immediately and have it inspected. Given the seriousness of this issue and reports from other GMC 5.3L engine owners experiencing similar rocker arm failures, I urge the NHTSA to investigate this potential defect. It poses a real and significant safety risk.

On Dec 27 I noticed a skip in my engine when I started the truck. I took the truck to Cronic Buick GMC on Jan 6 for an inspection. They reported to me that the engine failed.Seized up. I reported the incident to my extended warranty company Warranty Solutions. They refused to do the repair because I was late for an oil change in 2022. After 3 weeks and no cooperation I contacted GM customer service. I was assigned an agent that help initiate the engine repair . The repair was completed on April 12 (3 months after the failure). I paid $4600 out of pocket for a portion of the engine repair .

Multiple times today my tailgate dropped randomly without my knowledge. With the tailgate randomly dropping, and no warning lamps, messages, or other symptoms, it puts others at risk due to the potential for the contents of the truck bed to fall out into traffic causing damage or bodily injury to others on the road. During my research on what could cause this to occur, I was made aware of a recall of this same make, model, and year vehicle. The description of the reason for the recall was exactly what I experienced with my vehicle. I immediately attempted to confirm that my vehicle was listed on the recall by entering by VIN online. I discovered that there was not an active recall on my specific vehicle, so I contacted the nearest GMC dealership. After speaking with the service tech, he confirmed that my symptoms was exactly what the dealership had addressed with other vehicles that were on the recall list. He confirmed that my VIN was not included, yet the recall did have the same make, model, and year. I will be making an appointment at my dealership to repair this at my expense since it is not covered on the recall.

The contact owns a 2021 GMC Yukon XL. The contact stated while driving 70 MPH, the vehicle shuddered abnormally with the check engine warning light illuminated. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); however, the part to do the recall repair was not yet available. The vehicle was taken to the dealer where it was diagnosed and determined that the transmission control valve had failed and needed to the replaced. The vehicle was not repaired. The dealer confirmed that parts were not yet available. The manufacturer was not made aware of the failure. The approximate failure mileage was 66,000. Parts distribution disconnect.

Truck completely shuts off at any speed going down the highway. Complete loss of power. Have to coast to side of road and restart vehicle.

My multipro tailgate on my 2020 GMC Sierra 1500 unlatched while a trailer was attached and backing up said trailer. The trailer jack post proceeded to buckle the upper part of the tailgate assembly causing extensive damage resulting in over a three thousand dollar repair bill. If the tailgate had released while a child was in close proximity, serious injury may occur. The tailgate has inadvertently released twice in the five plus years I have owned it, the first time as I was traveling down a highway at over 60 mph. This could have endangered a vehicle to my rear if cargo had been released on to the road. I have reached out to a local dealership for repairs and assessment, no real way of troubleshooting something that has happened twice in five plus years. The scan did not show any codes. the info center does notify you if it is released but not before it takes place and after the fact may be too late in some circumstances as it was during the second occurrence. There has been a recall on 2500 and 3500 models with the exact same tailgate but not the 1500 models. 820K vehicles affected but not on the 1500's.

I took my 2019 GMC Acadia in for an inspection and was informed that the toe links were loose and fail inspection. Upon researching this failure, I found that there is a recall for this, but my VIN was no included. I don't understand why not given what I'm seeing from other owners. I quote from the GMC Authority site: [XXX] "GM and the National Highway Traffic Safety Administration have issued a recall for certain 2022 model-year Cadillac XT5, Cadillac XT6 and GMC Acadia crossovers over an issue related to the rear toe links. The problem: affected vehicles may have a left-rear suspension toe link with a fastener that was not properly tightened during assembly at the factory. The GMC Acadia is built at the GM Spring Hill plant in Tennessee, but will soon be moved to the GM Lansing Grand River plant to make room for the Cadillac Lyriq. The Cadillac XT5 and XT6 are also built at Spring Hill and will remain there for the foreseeable future." Based on other feedback seen, it appears this should be a recall for my vehicle as well. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)