2002 Oldsmobile Bravada • 198,000 miles

Our Bravada won't start after its been sitting in a warm parkade. It starts after its been outside in the cold (down to -30 with wind) repeatedly but once it sits in a warm parkade for more than 12ish hours it has no power. Then when we boost it, it struggles to stay started. It sounds like its not getting fuel. There are no lights that even come on when we put the key in the ignition. Everything seems to be drained. It has a brand new battery. It's been checked to see if anything is draining the battery but its come back completely clean that there is nothing. Has anyone experienced this it heard of this?
January 24, 2013.

Check out the related content below while we wait for the question to be answered by a professional mechanic.