I found a really good deal on a 2008 vortec 6.0 and a 4l80e with all the accesories and wiring harness and ecm with 27k on it for super cheap. it came out of a wrecked savanna cargo van. is there anybody modifing the harnesses fo an 08 and reprograming the ecm? the older style 6.0 is not the same

FSM and pull the harness apart as you need it:homer: GM finally bought a clue and made almost all the circuits in the engine harness individual... for example, the rear o2 sensors are a bundle of four wires not tied into anything else.