My system was acting as though I had an Alternator or Battery issue also. I'd top off my battery if it was more than 6-8 years old, and then I'd check the voltage at the alternator terminal itself, and at the jump-start terminal, to see if I was losing anything to that charging wire.I do not know if the previous owner had replaced the Battery or not. The other day I noticed the scanner readout at hot idle was 13.9 to 14 volts. As far as I know, I have the original alternator, so the stock setup seems enough to handle all the original options. On my '97, both the new battery and the refilled OEM battery had very little voltage drop at idle. It might make 140 amps if it's cold, and the engine is spinning 4 grand, but at a hot 2,000RPM cruise (or all that stop & go idling around town) it's not gonna' put out as much current. I certainly know that GM makes mistakes, but technically speaking, a 5' long, 8AWG wire can carry 100 amps - and 100 amps is mostly the max of what I'd expect out of a 140 amp alternator. Just to play devil's advocate, Kyle's complaints are typically indicative of a low battery or a low-output alternator.

Eldo wrote: That sounds like another cheap and easy mod, and IIRC you've already replaced your battery, right Rick?

Ac Delco Car Battery Serial Number