I have an 88 blazer project that im in the reassembly phase and im at the wiring part. the harness i had was cut at the firewall to the computer. i bought a replacement from a junkyard BEFORE i researched the partnumbers. i now hav an engine harness for a 91 suburban that does not fit at the bulkhead connector. it has 3 more circuits that the blazer does not have. Could anyone offer me some help as to where i go from here? Can i cut the bulkhead conn. from the blazer harness and wire it to fit the suburban harness? i not know that the harness for the blazer was only made for the 87 and 88 years. should i keep looking or is there a company that makes a direct replacement for what i need. PLEASE HELP ME!!!!!!!

You might have better luck finding the part number from the ECM (computer) and look to see if painless wiring offers a replacement fuel injection harness. As far as cutting and splicing, it can be done assuming you are good at wiring...or you will end up with a mess. Find a wiring diagram for that model year to assist in keeping it straight.

:agree:

Wiring modifications can be done, and done cleanly to just about anything.

All it takes:
1) Good wiring diagrams.
2) Hours of research (for replacement terminals, plugs, etc.)
3) Purchasing hundreds of different terminals to get the one you need.
4) Lots of really expensive tools. (I just dropped about $500 on crimpers to do just 5 or 6 flavors of Delphi Packard terminals, and if you are not familiar with Delphi Packard, turn back to step two, or just run!!!)
5) Hours and lost hair of trying to understand wiring diagrams.
6) The satisfaction of knowing you have done as good a wiring job as the factory.

To do it right is very rewarding...but it is not for the feint of heart. In the end, if you have a rats nest of wires and splices, you haven't really accomplished anything except a chicken s rats nest of wires. If you are going to tackle it, good, but in the end it will probably be less time consuming and cheaper to find a replacement harness before you ever set out to make a modification.