Question about 2002 GMC Envoy
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Posted on Jan 02, 2017
The service engine light you refer to is telling you you have a problem with the computerrized engine control of the car.When the light comes the computer stores a numerical code that can be retrieved with a scan tool or code reader.If you are not experienced with diagnostics you need to take the car to a mechanic,because sometimes a code can fool you and you can change a good part.An example of this would be reading a code that the oxygen sensor is reading a lean condition setting the light on. but the real issue is a bad fuel pump not supplying enough fuel to the engine. On the code alone you would be inclined to change the sensor when it was not the problem.
Posted on Nov 26, 2008
check the wiring at the column make sure nothing is dis connected you might have hooked up a wire in wrong place voltage change will cause light to come on
Posted on Oct 19, 2009
Have your ABS Wheel Sensor checked, it is mounted on the hub of your axle. it could have gotten dirt on it or it is bad and it is not giving a signal to the ABS Module.
Posted on Jun 13, 2010
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