The tach wire coming out of C100 on the firewall will tap into the tach "white" wire on the pcm. The speedo will get it's signal from the VSS. It will be a challeng but you'll enjoy it if you have a little patience.
The tach wire coming out of C100 on the firewall will tap into the tach "white" wire on the pcm. The speedo will get it's signal from the VSS. It will be a challeng but you'll enjoy it if you have a little patience.
Last edited by NITROUS; 01-09-2008 at 09:20 PM.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
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