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Owners of some 2004-05 Cadillac XLRs and 2005 Chevrolet Corvettes may comment that the battery has a low charge or is completely discharged at times.
If a cause can not be located with normal diagnosis, check with the customer or the sales department to determine if the vehicle is equipped with an aftermarket security system. These systems use a small transmitter or GPS locator that is hidden in the vehicle and is usually unknown to the technician. The transmitter is typically installed in the hot-at-all-times dome lamp circuit and prevents the Body Control Module (BCM) from entering the sleep mode.
- Thanks to Paul Radzwilowicz, GM Techlink, June 2005
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