Question about 2003 GMC Envoy Xl
The person running the test is an idiot. The OBDII test instrument is not capable of determining if there is a warning lamp failure. It is probably guessing based on voltage level, but lamp resistance does normally vary. The test is supposed to be done visually. Take it to someone else, and they will probably be more competent and pass your car.
Posted on Mar 22, 2011
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Posted on Jan 02, 2017
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