I'm gonna go ahead and say I"m just getting started with these engines, I've only delt with carbed small blocks so far. So please bare with me. I am looking at an 06 2wd 2500hd that is wrecked. I am wanting to put the engine ( lq4) and trans(4l80e) in my 2000 Silverado which is 4.3 powered now. My biggest question at the moment is am I going to be able to use the engine wiring harness from the 06 and just change to a DBC TB or am I going to have to get one from a 2000 v8 truck? I know I have to do some wiring for the trans to work if I use a engine harness from a 1/2 ton truck that had 4l60 thats why Im wondering if I can use the harness from the 06 since it already has the plugs for the trans? Are the plugs on my ecm and the 06 the same or different? Thanks in advance and sorry if these are dumb questions