my truck is still running sluggish after doing a lot of repairs to after thecode on 2002 Chevrolet Silverado 2500 HD

I have replaced the coils, Intake and valve cover gaskets, fuel regulator,fuel injectors plug and wires and it still has no power what else could it be

by in Ashland, OH on July 21, 2013
1 answer
ANSWER by , July 23, 2013
Is there a check engine light/ service engine light soon?