Dead Battery or No Crank with XM and Rear Seat Audio - kw draw electrical excessive information inoperative no operation radio receiver RSA start U2K UQ1 UQ3 U1P battery

The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.

Battery is dead or vehicle will not start when equipped with rear seat audio and XM Radio.

On vehicles built prior to 5/1/04, a condition may exist if a vehicle is equipped with RPO: U2K (XM Satellite Radio), UQ3/UK6 (Rear Seat Audio), and any radio except UC6 (6-Disc CD Changer) and UM8 (Navigation Radio). This condition exists only after the ignition has been turned off after RSA has been left 'on' and the RSA XM satellite radio source has been selected. If left in this state the vehicle could experience excessive battery draw. From all appearances, the radio and RSA are off, but this is not the case. This draw could range from 2.0-3.0 amps and result in a dead battery.

If significant battery draw is present when RSA is 'on' and RSA XM band source is selected prior to turning vehicle off, observe the Tech 2 message monitor for active modules including radio and DRR (Digital Remote Receiver). If the DRR and radio are active on the Tech 2, there may be a software issue with the radio causing this draw. If either or both of these two modules stays active, contact a radio exchange center and request part number 10376762 (CD) or 10376760 (Dual). Note: The exchange centers will only provide the listed part numbers and accept '03 radios for exchange for vehicles with the concern and RPOs mentioned above.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(2003-2004 Buick Rendezvous)

.