![Aren't they all supposed to drop to zero when it isn't turned on? [4000x3000 - 655KB]](https://pic8.co/sh/ADyGHJ.jpg){kind=link}
I don't use the OnStar. It's just some shit that came with it when it shipped brand new twenty years ago.
I don't use the OnStar. It's just some shit that came with it when it shipped brand new twenty years ago.
Chances are it's a weak battery. A proper load test done with a cheap $100 dollar scanner will tell you. Alternator should output in general 14.4v anything higher it's over charging and it if starts low 12.9-13.6 then goes up that's going bad slowly
Chances are it's a weak battery. A proper load test done with a cheap $100 dollar scanner will tell you. Alternator should output in general 14.4v anything higher it's over charging and it if starts low 12.9-13.6 then goes up that's going bad slowly
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