Join Date: Dec 2012
Location: Tucson az, but moving soon
If this is anything like a tach install it is difficult. Well, for me it was above my head. Your camaro has 8 ignition coils, this means you can't hook it up to just the negative side of one. A tach gauge should be ran through the ECM like a car security system. I know you said shift light but i bet its ran the same way, off of RPM.
I could be wrong, i don't know for sure. I just know i had an after market tach i was going to install (changed my mind) and i would of had to go to someone thst deals in car alarm systems because like i said, the one wire for the alarm system goes into the ECM where the Tach would go also