Quote Originally Posted by LRT View Post
A 2000 model year 7.4L would have been paired with a 4L80 transmission, and would have used the older "Black Box" Vortec PCM. This was the final model year for the 7.4L, and they never used the later LS1 (P01) PCM - sometimes referred to as an 0411 PCM - so there is no OEM wiring harness available that had a P01 PCM.
This brings up a question re my 2000 Camaro PCM, which according to the hptuners scanner is a P01 (it says "ECM: 10, VPW - P01"). This is the original PCM that came with the car (which I bought new in 2000, so it's definitely original). But supposedly 2000's did not have the 0411 PCM, so wondering what I really have. I was considering getting a 0411 just for the supposedly faster cpu (compared to the 99-00 PCMs). It is running the correct OS for 2000 (9381344), which I plan to replace with an 02 OS (12212156).