OnStar Backup Battery 2004 H2 - Hummer Forums by Elcova

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OnStar Backup Battery 2004 H2

12-04-2010, 04:25 PM

Olfart

Hummer Veteran

Join Date: Nov 2009

Location: Georgia

Posts: 85

OnStar Backup Battery 2004 H2

Started getting a RED light on OnStar. I can get it to turn back to white by pressing the OnStar button, but if truck sits a couple of days then RED comes back on. Called OnStar and they said it might be the backup battery going bad. Has anyone ever replaced this battery or is it something else that the Dealer must get rich doing....ie programming, etc.

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2004 Black H2

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