Table 1 shows one common vehicle speed control related problems of the 2023 Chevrolet Colorado.
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control problems |
My 2023 Chevrolet Colorado (2. 7l, approx. 49,000 miles) experiences sudden, intermittent loss of motive power involving the 8-speed automatic transmission. The transmission sets codes and the vehicle drops into limp mode, capped at roughly 45 mph, without warning. The most dangerous symptom is a total loss of acceleration from a stop, especially on inclines — pressing the accelerator produces no response. On one occasion, stopped on a slight incline, the vehicle rolled backward toward the car behind me when it failed to move forward on accelerator input. I narrowly avoided a collision. On a separate occasion, after pressing the accelerator with no response, the vehicle then suddenly lurched forward into cross traffic; repeated presses produced inconsistent, delayed engagement, nearly causing a collision. To climb inclines I now have to hold the brake while applying throttle and slowly release the brake to prevent rollback. These are unpredictable loss-of-control events that create a serious crash risk in traffic. I believe this relates to a known issue affecting the gm 8-speed automatic transmission. The vehicle is currently at a gm dealer and I have an open gm customer care case. No crash, fire, or injury has occurred yet, but two near-collisions have.
Vehicle accelerated on its own at a stop and then at highway speeds. Took it to dealership who experienced the same thing and confirmed the issue and could not find the reason why.
What component or system failed or malfunctioned, and is it available for inspection upon request? to my knowledge, which is limited on vehicle diagnosis, the engine valve body is having an issue finding a gear when starting from a stop. How was your safety or the safety of others put at risk? the vehicle engine will sputter and jolt forward and attempt to go to a higher or lower gear when approaching the stop . Has the problem been reproduced or confirmed by a dealer or independent service center?the problem is reproducible, but the dealership is stating I would need a check engine light to have it serviced or seen. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? no. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no visible alerts of fault when issue occurs or thereafter.
I turned my vehicle on and noticed the instrument panel screen was completely off. I tried to turn it off and on again and it stayed off. I had to drive home with no instrument panel. After 5 hours I turned on the truck and it finally came on.