› Forums › Car Problems & Maintenance › Chevrolet › Why is my 2021 Chevy Trailblazer check engine light on?
May 12, 2025 at 5:14 pm
#1165
Amanda
Find a different mechanic, clearing the codes does not fix problems, it just clears the readiness monitors which reset after a pre-determined amount of time / starts / running conditions. If there were no problems, the codes would have cleared themselves.