Is Onstar killing my battery?
#1
Is Onstar killing my battery?
Saturday, after sitting for two and a half weeks, my H3's battery was completely dead... again. It is unable to hold a charge past 2 weeks due to some sort of power drain. This is not helped by the notoriously bad delco battery they stick in the H3. I am convinced that OnStar is the root of my problem here. I live in an area that has really bad coverage and i think the OnStar cellular system constantly searches for a signal even when the truck is off. My service isnt even active right now. I have a co-worker that has a canyon and he has noticed the same thing after leaving his truck in a parking garage for a week, his truck is dead.
So, what i really want is to power off this system. Anyone know if this can be done?
So, what i really want is to power off this system. Anyone know if this can be done?
#2
RE: Is Onstar killing my battery?
I don't think your Onstar is active when the truck's off. My dealer did install some GPS locator thing (Inilex, I think) that has it's one battery and can suck the life off of the main battery. Your battery could just be dying.
#5
RE: Is Onstar killing my battery?
Onstar is not your problem. You either have an accessory draining it (i.e. cell phone charger, radar detector, etc.) or there's a module causing excessive drain. Take it to your dealer and ask them to test the battery, if the battery passes then ask them to do a parasitic draw test on the vehicle. this will give them a starting point on tracking down the culprit. If you do have something plugged in, unplug it when the truck sits for more than a week and you'll be fine.
#10
RE: Is Onstar killing my battery?
Thankfully I'm with you 3Hummers. Haven't had any issues like alot on here. However when the battery does go it will be replaced with an Optima Deep Cycle