2000 s-10

[Truck633]

I have a quick question. When running at night, my volt meter holds steady at just under 14 volts, when you release the accelerator (like pulling up to a stop sign) the lights dim and the volt meter drops down to 11/12 volts. It only drops for a second then jumps back up and everything is fine. I thought the voltage regulator was going out, so I replaced the alternator. No change. It hasn't really been a problem, it is just annoying and if someone has had this issue before and knows of an easy fix, I would appreciate the info.

Thanks in advance

Tom

[jdl]

The service bulletin, I looked at showed, normal operating condition, unless proven otherwise. Is this just a recent occurrence? I'd use a digital multimeter to double check gage reading, at alternator bat terminal or across battery posts. Any charging system trouble codes?

[Truck633]

It has done it since day one, just gotten progressively worse. It hasn't caused any problems it is just really annoying.

[FishFind]

My 99 does that too. Seems that when yer under power the alternator cranks more power out. I did notice that when I changed my alternator I did the battery with it and now it stays at one spot. Not sure if it was the battery or alternator that made it stop.