The check engine light means there is a problem with the emission systems on the vehicle. The service engine light means that a regular schedule service is needed. Most of the time this means you need an oil/filter change.
You can either bring it in to a Chevy dealer or use a programmer/tuner to reset the check engine light.
How do I reset the service engine light on a 2003 Chevy Trailblazer?
You will have to have a engine scanner to do that. But something made it come on and if you did not fix the problem it will just come back on again. HAVE ENGINE SCANED SOME PARTS STORES WILL DO IT FOR FREE.
Maybe you should service the engine soon. :P
can you tell me why my 1999-2000 Chevy trailblazer light is on
Check
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.
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That requires an OBDII engine scanner.
top of brake pedal
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle.
I reset the check engine light on my jeep by disconnecting it from the battery.