i bought motor trans and ecm from a buddy of mine who rolled his blazer.he had motor and trans built, he pulled motor an trans himself. but when he too the ecm out he just cut all wires. he saved the ecm plugs thats about that junked the rest. do you know where i can get the ecm schematic or color code. i can can make my own harness if i knew the color code. thanks widgetmaster

 

Hi widgetmaster,

Welcome to the Chevy Forums.

mortec.com, and carnut.com come to mind, but I can make no guarantees.

Barring them, you can probably find your info at alldata.com, but there is a fee.

What year are we dealing with here?

 

If you buy a Haynes repair manual for that particular model of vehicle that the engine came out of - it will have all the wire harness in the back of the manual.

There is companies on the internet such as Painless - that makes wiring harnesses that is a direct replacement for most styles of engines and transmissions - just that they are very expensive to reproduce.

Your best bet would be for you to go to a junk yard and find a donor vehicle with a good harness and adapt it to fit your vehicle.