2006 GMC C2500 Dead Battery

2006 GMC C2500
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TOM MCPHILMY
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Electrical problem
2006 GMC C2500 V8 Four Wheel Drive Manual

In summer 2008 began ride motorcycle to work, if tuck was not used for a week battery was dead. This summer battery goes dead in 24 to 48 hrs. Battery was change for a nearly new battery this spring. When run every day even in winter truck is OK. Must have a draw down some where in system.

What should be suspect first? Or second third?
Sep 12, 2009 at 7:38 AM
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DR LOOT
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Do you have on OnStar? and is it active? the reason I asked that is because OnStar knows where your truck is at all time and it does draw the battery dead. If you do not use it, this is what I want you to do. Get in your truck and contact OnStar have them do a diagnosis on your computer and see if they come up with anything. Also, if you leave your truck parked with the alarm activated. It will drain your battery also.
Sep 20, 2009 at 4:38 PM