Mikes07
Member
i recently picked up a 2001 Silverado HD with the 6.0. Long story short is my buddy who owned the truck before me had an injector problem, replaced with rebuilt ones from rock auto and one stuck open and hydro locked cylinder 5 and broke rod. He picked up another 6.0 out of an 02. Then he lost interest and bought another truck. So I bought his 01 with the 02 motor waiting to be installed. I have it in and have been driving it for a month or so and it doesn't seem to right yet. It runs great, no code, but seems sluggish and unresponsive at times. It also turns over a lot in the morning after sitting. Car starter cycles three times before it actually stays running, once warm it's fine. I've done new sending unit, fuel pressure regulator, coolant temp sensor, fuel filter, airmass sensor, plugs, wires. I'm wondering if it's because it's not the ecm for that motor?