Im lost
I got a 03 chevy silverado 1500 with the 5.3.
My issue is ibe changed the intake gasket
throttlebody fuel pump and regulater, mass
air flow fuel filter, fuel lines full tune up in the
last 3 weeks used all ac delco parts. Can
anyone give me advice on where to look
next. I no lonher have any check codes.
Truck still runs extremely rough only when in
gear. And only over 25 mph