| Subject: | Supplement To Bulletin 04-08-44-020B |
| Models: | 2004 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2004 Chevrolet Avalanche, Express, Silverado, Suburban, Tahoe, TrailBlazer, TrailBlazer EXT |
| 2004 GMC Envoy, Envoy XL, Envoy XUV, Savana, Sierra, Sierra Denali, Yukon, Yukon Denali, Yukon XL, Yukon XL Denali |
| with CD Player Radio (RPOs UB0 or UB1) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment on one of the following conditions:
| • | Long CD load-to-play time |
| • | CD ejects with an error message of "CHECK CD" |
| • | CD does not return to previous track after an ignition cycle |
The cause of this concern is a software anomaly within the radio. The bulletin reflects that 2005 vehicles have been corrected with updated software calibrations, but does not address any 2004 vehicles. Any 2004 vehicles built between Feb. 2004 to the
end of 2004 production could have any of these concerns.
Recommendation/Instructions:
At this time Engineering is working on new software calibrations. In the mean time, if the customer comments that the CD does not eject or the CD is stuck in the CD player without any indication of clicking noises or mechanical operation, perform the
following steps:
- Turn off the ignition.
- Remove the radio fuse for a minimum of 30 seconds.
- Reinstall the fuse, turn on the ignition and the radio.
- Attempt to remove the CD by using the eject button.
- If the CD was successfully removed, then new software calibrations are being developed.
- If the CD was not successfully removed, then the radio must be removed for repair at an authorized Electronic Service Center.
Please follow this diagnostic or repair 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.
