I had to jump start the truck ( which they actually tell me shouldn't be done at all) twice. After that I the babied the battery for another year and then replaced it. ( actually reset all those fancy inside lights to the lowest power use settings) I called chevy and it was explained to me that under no circumstances was I to expect the battery to do anything besides start the car. I shouldn't ever expect it to operate the radio without the engine on or ever plug in a inflator device or anything else and expect the car to start. Obviously this was never again a problem once I replaced the battery,