I have 2004 gmc pickup truck with new battery. The truck sits for 2 days and battery is dead now. And after a jump it runs and on two occasions the gauges went to zero. The dealer has found no draws of loss power using meter. Why is truck battery not showing no draws of loss power using meter? How can it be dead in just two days? What can I do to stop it from happening again in the future? However, it is clear after about 2 days of not running the battery is dead enough and that it will not start. Please advice. Thanks.