Two problems related to battery dead have been reported for the 2007 Chevrolet Avalanche. The most recently reported issues are listed below.
Have a 2007 Avalanche ltz with everything in it. Had the same problem letting it set for extended period of time and having battery dead when going to start same. Jumped it and started fine. I can hear the computer working when vehicle is shut off and believe this is why. Need to start same often and run or put a battery charger on same solar to keep from happening. Dealers say they can find no reason for it.
Electrical problems, battery going dead, manufacturer will not say what is causing problem because they cannot find what is causing it. Been in service 30 days and over 7 times for the same problem. Will not step up to the plate and repurchase the vehicle.