[rendezvous]

Would anyone be able to help me with this TSB? Buick has tons of TSB regarding the Rendezvous and now I have a Rendezvous experiencing this electrical problem. The car will be fine for days or even weeks, then one morning you come out to start it and the battery is completely flat. Like someone left something big on all night. This problem doesn't have anything to do with how long it sits, although it has to be overnight or several hours. Temperature doesn't matter, it can be 50 degrees or 8 degrees, it may happen, it may not. Nothing obvious is staying on interior lights, glove box, map lights, all go out after allotted time after exit.

This last time I didn't touch anything and started digging. There was a 2.5 amp draw somewhere?? By the time I got into it, probably from opening doors, etc., it went away.

That's what brought me to the internet, and here. This TSB sounds exactly like what this car is doing and it does have an XM radio and rear seat audio, both of which are part of this TSB.

Besides the inconvience of coming out in the morning to a car that won't start, I'd rather not end up replacing the battery too! How many times can you kill a battery this bad and expect it to recover?

Any suggestions based on experience or the TSB, would be greatly appreciated !!

TSB No.: 3024 NHTSA No.: 10009639

Thanks

Steve