Voltage Regulator Alternator Output ????

[bugdewde]

Noticed the volt gauge was at 11 again last night while coming home.
Popped the hood & checked the battery terminals ... yep, loose. Retightened them and gauge went back to 13.

May have to figure out a way to fit lock washers on them.

 

[GMCanada]

So twice now my positive side battery cable bolt has loosened off enough that the truck wouldn’t start. This GMT400 is not my daily driver and I just acquired it last fall, so I honestly don’t know yet where the gauges should be. I did put a new battery in it the day I got it. Ok enough back story and now onto my issues. I just noticed tonight under hard acceleration (+4500 rpm) my battery light comes on. Also I noticed my power locks will lock, but not unlock. I’m going to try cleaning the battery terminals and see if that helps, if not I guess I need to start testing electrical parts.
(Note. A few weeks ago I left my interior light on and it killed my new battery. The vehicle was in a heated garage the entire time and I slowly recharged the battery before starting the truck).