You need to have it checked for codes. If you fix the cause of the codes the light will stay off.
How do I reset the service engine light on a 2003 Chevy Trailblazer?
take it to autozone they will check for free. wolverine Probably some problem with the smog controls. Probably nothing too major. If the service engine light is flashing, it's probably major.
can you tell me why my 1999-2000 Chevy trailblazer light is on
Maybe you should service the engine soon. :P
on mine i just changed the o2 sensor located in the front by fan
When service engine light is on on a 2003 Chevy Trailblazer, the problem could be a faulty thermostat, a circuit range performance problem, or any other problem.
That requires an OBDII engine scanner.
time for an oil change
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.