Check engine light comes on intermittently...especailly when hauling a load.
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1999 Chevrolet Silverado 1500
Question: check engine light
Answer #1rdude135 April 09, 2009, 05:40Journeyman
There are many reasons why the check engine light comes on. Using a scanner is needed to pull the diagnostic code, and from there the system will have to be diagnosed.
Answer #2Visitor, December 25, 2010, 21:21
check fuel pressure bad fuel pump