PCM curiosity

[Truckchevy4]

I have a 03 1500 5.3 z71 the pcm has gone bad. I bought one from a guy that does tuning on PCMs for ls vehicles and he programmed an 0411 pcm for me but when I went to plug it in the connectors are different. The pcm I bought is a blue red connector my truck is a blue green connector. Being that the pcm is programmed for my truck would the pcm actually work for my truck without any further modification than trimming the tabs on the connector.

[CamGTP]

Nope.

 

Not even close. The two computer are wired completely different on the PCM connectors. You have a paper weight on your hands. Besides you can't put a 2003 operating system or VIN number in a 1999-2002 P01 (0411) computer.

 

Email/call the guy and tell him he messed up and you need a refund or a computer that is a P59 designed for your truck.

[Truckchevy4]

Would the wiring be much different if the rear oxygen sensors and emissions system is being deleted or is the wiring different on other parts

[CamGTP]

Both connectors use different pin outs for various things.

 

Then you could also run into issues with things with the dash and cluster that no longer function because the computer is not from the correct year range. You need to get the correct P59 computer.

[Truckchevy4]

I did end up getting the correct computer and got it all working thanks for the input

[txab]