What 59 owners told NHTSA about the 2018 Chevrolet Impala

The contact owns a 2018 Chevrolet Impala. The contact stated that while the A/C was activated during the summer of 2025, the A/C failed to function as intended. The contact stated that hot air was blowing through the vents. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed the vehicle with an EVAP leak. The leak was found on a corner near the evaporative canister. The vehicle was not repaired. The vehicle was then taken to the dealer, where the EVAP leak was confirmed. The vehicle was not repaired due to the cost. The vehicle was taken to a specialty shop for the repair. The manufacturer was made aware of the failure and offered to pay a nominal part of the repair. The contact declined the assistance. The failure mileage was approximately 60,000.

NHTSA ODI 11727989

When driving on the highway at full speed my car suddenly loses power almost causing me to be hit from behind. I then get a Reduced Engine Power warning. Once I get the car off the road, I shut the engine off for a few minutes and then restart it. The car runs fine but the check engine lights remains on. This has happen 4 times this week.

NHTSA ODI 11458634

I noticed lately my car has trouble starting, especially after I get gas. Anywhere I take it, no one knows what it is. Literally someone said that I’m not holding the brake down when I’m starting it. I KNOW HOW TO START MY VEHICLE! It doesn’t want to start and sounds like a broke down Saturn when I start it. It takes like 20-30 seconds to start. ALSO that AC went out, I paid $700 AT Chevy, and then the AC went out again a few months later, again no one knows why. WTF!

NHTSA ODI 11458743