Is Onstar killing my battery?
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Is Onstar killing my battery? - 5/5/2008 1:57:55 PM
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n0m4d
Posts: 66
Joined: 11/7/2006
Status: online
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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?
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Winter: 2007 H3 - Red 5sp w/ Sunroof, Toyo 35's, PIAAs in the driving lights and Sirius on the HU
Summer: 2001 Toyota MR2 Spyder w/ SC'r
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RE: Is Onstar killing my battery? - 5/5/2008 2:17:33 PM
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alrock
Posts: 1045
Joined: 5/12/2007
From: Scottsdale, AZ
Status: offline
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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.
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RE: Is Onstar killing my battery? - 5/5/2008 2:21:06 PM
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3hummers
Posts: 11750
Joined: 9/23/2007
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Doubt Onstar is the issue or there would be dead Hummers all over the place. What diagnostics ahve you performed to try to isolate the draw on your electrical system?
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2006 H1 Alpha wagon
2000 H1 Slantback
1997 H1 wagon
2008 H3 Alpha
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RE: Is Onstar killing my battery? - 5/5/2008 3:45:41 PM
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Hummer Guy
Posts: 641
Joined: 2/9/2007
From: Home of the Hummer
Status: offline
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Wouldn't be onstar. Do you have any aftermarket electronics installed? Have you had the battery replaced at all?-
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-Brian
http://www.hummerguy.net
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RE: Is Onstar killing my battery? - 5/5/2008 4:29:54 PM
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HummerMike
Posts: 376
Joined: 8/8/2006
From: Crown Point, IN
Status: offline
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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.
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'08 H3 ALPHA w/Adventure Package. Graphite Metallic, Mickey Thompson Baja MTZ's, Rocker Panel & Driveline Protection, Winch, more to come...
www.illianahummerclub.com
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RE: Is Onstar killing my battery? - 5/5/2008 5:05:19 PM
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SteveO
Posts: 313
Joined: 6/2/2007
Status: offline
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Could also be a bad voltage regulator............
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RE: Is Onstar killing my battery? - 5/5/2008 6:28:33 PM
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alrock
Posts: 1045
Joined: 5/12/2007
From: Scottsdale, AZ
Status: offline
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I've also seen car alarms do it - try just locking the doors vs. using the remote.
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RE: Is Onstar killing my battery? - 5/5/2008 7:27:06 PM
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cbetts
Posts: 158
Joined: 4/7/2007
Status: offline
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My money is on the crap batteries they keep putting in the H3. I am on number three right now at 30,000 miles.
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Hummer Geek
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2006 H3/Slate Blue/5-Speed/Adventure/Sun Roof/Lots-O-Stuff
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