Computer Wiring Diagram

I HAVE A 1989 S-10 BLAZER 4.3 L. I NEED A WIRING DIAGRAM FOR THE COMPUTER TO HOOK UP AN APEXi REV/SPEED METER. I CONTACTED GM TO GET ONE AND THEY TOLD ME THEIR RECORDS DID'NT GO BACK THAT FAR. IF ANYONE HAS INFORMATION ON THIS I WOULD APPRECIATE IT. P.S. PLEASE FEEL FREE TO LIST WEBSITES (IF ANY) THAT DEAL WITH THIS SUBJECT. THANK YOU.

I HAVE A 1989 S-10 BLAZER 4.3 L. I NEED A WIRING DIAGRAM FOR THE COMPUTER TO HOOK UP AN APEXi REV/SPEED METER. I CONTACTED GM TO GET ONE AND THEY TOLD ME THEIR RECORDS DID'NT GO BACK THAT FAR. IF ANYONE HAS INFORMATION ON THIS I WOULD APPRECIATE IT. P.S. PLEASE FEEL FREE TO LIST WEBSITES (IF ANY) THAT DEAL WITH THIS SUBJECT. THANK YOU.

I think I may have one if you still need it let me know and I will look.

Hi CS....

If you still have one could you scan me a copy I am having some wiring issues and that might just help me out.

THanks-
Khris