Battery loses charge in 2007 Denali

Could be something as a switch left on or another accessory pulling a current draw. To find out if that is the issue a parasitic draw test would have to be done. I would also verify the battery is in good condition with a load test prior to doing the draw test. Good Luck!

Brian is correct. And sometimes a battery will have an internal short even if can pass the load test. Disconnect the battery overnight and see if it's dead in the morning. If it's okay, then proceed to the tests suggested by Brian.

2007 Yukon Denali runs navigation disk check continuously when ignition is off. Also the air shock load leveler compressor runs when the ignition is off.. The battery is under a constant parasitic drain and this often kills the battery and ignition won’t start.