Check engine light


Asked by May 25, 2016 at 06:55 AM about the 2003 Chevrolet TrailBlazer LTZ 4WD

Question type: Maintenance & Repair

My o3 trailblazers engine light has been on for the
past month. What is causing his?

2 Answers

Tom Demyan

Any number of things, good news is since the light is on, a code or codes are stored in the cars memory, so you can scan the car for the faulty codes. Most auto parts stores will do this for free. Post the 4 digit codes back here and we'll help further.


have the computer scanned at autozone or some other auto parts store and post the results back here.

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