I'm running a CS 105A on my 3.0. If you're running an older gm alt you could easily swap to a newer GM style alt like mine. like off an 89 LeSabre 3.8 or somin. You can get a new harness from NAPA for $20. for my alt it's... sense, light...and Batt output. Seems like it's 3 wires on the back. I'll check tomorrow for you. and I wouldn't put my life on those checks they do in Autozone etc. best test is IN VEHICLE TESTING.

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