Assist Problems of GMC Sierra 3500

On christmas day 2025 my tailgate flies open on its own and I see my cargo flying out and a piece of it bounced off my taillight passenger side braking the taillight and then when attempting to pull over my lane departing feature try’s to correct its self and I hit the median luckily at slower than I was going but enough to make a decent dent on front bumper.

See all problems of the 2023 GMC Sierra 3500 🔎.

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.