Background:
1996 Tahoe 2dr. 5.7L, Auto, A/C, 4x4, Single battery.
My battery and Alternator are both good. Charging is right at 14volts when running. 12.6V with engine off. I have a Optima Red top that is 1yr old. I have a 105A alternator that is two yrs old. All wiring is clean (meaning no...