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.

Source: NHTSA complaint ODI #11744039 · view all complaints for this vehicle at nhtsa.gov

The contact owns a 2023 Chevrolet Colorado. The contact stated that while the vehicle was parked, there was smoke coming from the front tires, and the tires were extremely hot. No warning lights were illuminated. The contact became aware of the burning tire odor coming from the vehicle. The vehicle was taken to an independent mechanic after a tire rotation. The contact was informed that the calipers and brakes had failed and needed to be replaced. The vehicle was scheduled for the necessary repairs. The mechanic contacted the dealer about the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 42,400.

Source: NHTSA complaint ODI #11762838 · view all complaints for this vehicle at nhtsa.gov

Roof dents when going through car wash and blowers will dent the roof. GM has a service bulletin on this lbulletin number 23-NA-209 DATED March 24. Bulletin says that all Colorados built before Feb 3rd 2025 should be repaired and gives a part list and how to fix it 9 pages long. BUT GM says my vin number is not showing a recall and will not fix it My Colorado HAS NO DAMAGE BECAUSE I HAVENT PUT IT THROUTH A CAR WASH TRYING TO GET THEM TO FIX WITHOUT PUTTING A DENT IN IT. THE FIX IS PUTTING SUPPORTS IN THE ROOF TO REINFORCE IT.

Source: NHTSA complaint ODI #11693188 · view all complaints for this vehicle at nhtsa.gov

The collision avoidance system quit working. The warning light was displayed on the instrument cluster but no other warnings were sounded. After taking it to the dealer for repairs, they got the light to go out by downloading another software version, but it did not fix the problem. It only removed the light. The truck still would not give a warning when approaching another vehicle too fast or get too close at certain speeds. The dealer has kept it so far a total of 12 days and have yet to fix the problem.

Source: NHTSA complaint ODI #11643632 · view all complaints for this vehicle at nhtsa.gov