Fullpower

On 2003 Yukon: How many/ or which FUSES feed power to OnStar ?
I think OnStar is running battery down, trying to connect in a dead zone. ( no cell service )
Battery is only two years old charges up fully, and load tests good. Nothing else is on.

shakenfake

Bottom right "Info"

Do a parasitic draw test.

smokinlmm

I’d pull it reguardless. Google Lexus nexus credit report.

Earl Cordova

Not sure where you are located, but here in Arizona it is not uncommon for a battery to die after 2 years.

shakenfake

@smokinlmm Considering 3G is dead he has nothing to worry about now.

smokinlmm

Oh they are still tracking them just no coms on our side.

Fullpower

Alaska: Very mild climate. It's usual to get 5 or 6 years out of a starting battery.
Once in a while you'll have one go 8 years, but that is rare.
.
.
. Pulled the INFO fuse out of three vehicles. will check Key off draw after all the modules settles down.

Fullpower

INFO fuse removed from several GMT800 vehicles.
Everything still works, Key Off Draw 34 milliamps.