Having problems with your 2006 Hummer H3 ?
2006 H3 battery keeps going dead overnight. Battery was replaced last year. Took it to a dealer and they could not find anything wrong.
Something is being left on when you shut off the key. fastest way to tell this is to unhook the positive post of your battery and hook up a multimeter between the post and the cable. with the key off the amps should be almost zero (the radio uses a very small amount for memory) also take the battery out and have it load tested.
Repair Help & Product Troubleshooting for 2006 Hummer H3
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