Question about 2004 GMC Envoy
Basically all of them can examples bad map sensor messes up fuel mixture--some of the evap system same ---most of the sensors that are not for warning of breakage or breakdown/overheating--fan relays--oil press etc all are program sensors that the vehicles computer uses to regulate the fuel/air mixture and advance timing for the vehicle
Posted on Jan 05, 2013
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Posted on Jan 02, 2017
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