I'm have been searching to find a answer for this and have came up empty handed. Where in the engine compartment of a 96 Tahoe can I find the wire that feeds the factory tachometer in my dash ? I know which wire to use out of the PCM but can't figure where to hook it up, I'm sure I could probably pull the cluster out and find the wire behind the dash but is has to be coming from somewhere in the engine harness so I would prefer to tap into it there if possible. Thanks in advance