Question about 2003 GMC Sierra 1500
Does the problem code say its a lean condition. could be a bad vacuum hose, injector clogging up, try cleaning maf sensor most of the time this will do the trick!! ( manifold air flow ). its hard to say not knowing the code. clean maf sensor then go from there. is it po171--if so also check for vacuum leaks in hoses, even a intake manifold leak. just because a 02 sensor comes up it does not mean it is a sensor. a lot of times it is caused buy a exhaust leak ahead of sensor.
Posted on Nov 09, 2010
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Posted on Jan 02, 2017
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