04 chevy trailblazer ls 4.2 engine

Asked by Apr 24, 2017 at 05:15 PM about the 2004 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

I just replaced emissions coil and plugs .but I can't reset
check engine light.and truck is still running rough.is there
anyway I can reset with out computer?

1 Answer

121,115

If it is still running rough a reset won't fix it, the best way is to have it reset with a scan tool, your right in the gray area where if you disconnect the battery you may loose the factory presets so,none of your accessories will work and that will cost at least a hundred bucks to have it reflashed.

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