The service engine soon light is on because the ECM (Engine Control Module) has detected something wrong with the system. Until the problem is fixed the light will remain on. Any attempt to reset the light without making repairs will result only in the light coming back on again. Have a trusted mechanic diagnose the problem for you soon. Waiting may cost you more in the long run.
How do you reset check engine light for the 2009 Chevy trail blazer?
unhook battery or scan tool will do it
reset service engine light
A reset Engine Service Light comes on when an issue comes up with in the engine. This light can be reset by a tech or by fixing the problem.
Discconect the negative cable from the battery for a few minutes and that should do the trick
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How do I reset the service engine light on a 2003 Chevy Trailblazer?
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There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
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