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

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
Is there a check engine light/ service engine light soon?