Question about 2003 GMC Sierra 1500
Sounds like you created a potential short when you washed the engine. one of your sensors may be tempoarily shorted. I would wait for the water to dry out and see if the problem is still there. if the check engine light came on you could have the codes pulled by autozone or advance autoparts
Posted on Apr 26, 2010
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Posted on Jan 02, 2017
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