Adaptive Cruise Control Problems of GMC Sierra 3500

Battery would not hold charge and would need jump start. Transmission would not stay in gear while towing trailer and would only go to 5th or 6th gear and would jerk out of gear and oil temperatures would go to 225 degrees. Erratically shifting and while driving with cruise control stop with out warning.

See all problems of the 2024 GMC Sierra 3500 🔎.

We’ve had issues with the electrical system/brake lights when we hook any trailer (horse/boat/utility) to the truck. One issue is that the system shows unconnected and the trailer lights blink or do not work. We’ve brought this in to the dealer 3 times and they have yet to resolve the issue. The other issue of melted plastic on our rear sliding mirror. It just appeared one day, possible after using the rear defog button. We took it to the dealer and they also do not know what is the issue. We found several other blogs where owners have had the same issue. This is a newer vehicle, and we live in southern California where the temperature is mild. It just appeared one day. We are concerned this is a safety issue with the electrical system melting the plastic and possibly causing a fire. Here is a link to a blog: [xxx] lastly, this vehicle was advertised as having adaptive cruise and it does not have the capability (chip) to do so. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2023 GMC Sierra 3500 🔎.

There are 2 issues with this vehicle: #1) the rear window defrost causes an electrical issue that melted the plastic on our rear sliding window. Dealer claims we put something hot against the window but we did not. This appeared after we used the rear defrost. Several other owners have complained about this as well. #2) the vehicle is advertised as having adaptive cruise but it does not have this feature.

On March 22, 2023, my wife and I purchased a new 2023 GMC Sierra 3500 denali from coast Buick GMC. Before purchasing, we asked the salesman if it had adaptive cruise control and lane keep assist, and he said yes and showed us the buttons and explained how they worked. We purchased the truck because it had these features. Four days later, on a trip out of town, we found that the adaptive cruise control and lane keep assist did not work. We looked online and saw similar gm vehicles with the same buttons, showing how to use the systems, but ours didn’t work. During our trip, the salesman texted me and said he needed me to sign a document. I told him that we couldn’t figure out the adaptive cruise control and lane keep assist, and sal responded in writing via text, “ok be my pleasure to show you the adaptive cruise and lane keep assist. ” we came into the dealership the next day, on March 28, 2023, with only 251 miles on the truck, and were told it didn’t have these features. The dealership and gm have refused to make this right. Gm’s design of the buttons in the truck for the warning systems closely, if not exactly, match the buttons for adaptive cruise control and lane keep assist options in other gm vehicles, which is very misleading. My brother-in-law has a 2020 model and he still thinks his has adaptive cruise control and lane keep assist, but they just don’t work very well, even after I told him it doesn’t. Today, while dropping off my truck at the gm service department for repair, the service department representative said a lot of customers were told their GMC hd truck had lane keep assist and adaptive cruise control. This is a fraudulent or misleading design, which could result in serious injury or death.