With all your info available ...... V.I.N., Mileage, Update number, contact the Chevrolet Infotainment Team at 855 478 7767. See if their engineers can assist you.chrisc5 said:Intermittent Battery Draw
Some customers may comment on an intermittent battery draw concern. This applies only to vehicles with a navigation radio and rear park assist. The radio may stay powered up if the rear park assist alarm is going off when very close to an object (continuous chime) and the ignition key is turned off before the chime cycle completes. This happens due to a software anomaly in handling the chime. Even when the conditions are right, this is an intermittent concern, and is hard to duplicate.
Two different bulletins have been released to address this condition, depending on model and year.
PIT4770 applies to 2007-08 Acadia and Outlook U3R UZR and 2008 Enclave U3R UZR with navigation radio and rear park assist.
For these vehicles, engineering is aware of this concern and is working on a software fix. Information will be updated when a fix becomes available.
PIT4771A applies to 2009 Enclave, Lucerne, Traverse, Acadia and Outlook with navigation radio and rear park assist.
For these vehicles, reprogram the navigation radio with the latest calibrations in TIS. Under the operating system there is a calibration titled "New software to correct continuous chime and potential battery run-down condition".
I have a 09 Traverse with these exact symptoms. The first time it happened I replaced the battery. Been to the dealer for them to tell me nothing is wrong with the car. Today I copied this thread and took it to the dealer to have this update done and was told no such bulletin exists. Spoke with Chevrolet and they were no help either. Does anyone know where I can find more info about this software update? Car is great as long as you don't mind not knowing if the battery will be dead when you come outside to get in car. When it happens it can kill itself in as few as 8 hrs. Very frustrating