Radio Displays Locked After SPS Programming (PIT4007F)
Publication date: 2013-04-01Reference number: PIT4007F
Supersedes refnos: PIT4007, PIT4007A, PIT4007B, PIT4007C, PIT4007D, PIT4007E
RADIO DISPLAYS LOCKED AFTER SPS PROGRAMMING
TECHNICAL SERVICE BULLETIN
| Affected Model(s): | 2007-2009 Cadillac Escalade, ESV, EXT 2007-2009 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2007-2009 GMC Sierra, Yukon, Yukon Denali, Yukon XL, Yukon Denali XL 2008-2009 Hummer H2 |
| Supercedes: | This PI was superseded to update recommendation field. Please discard PIT4007E. |
SERVICE INFORMATION
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
CONDITION/CONCERN
Some technicians may find that after SPS programming a replacement radio, the display will show "LOCKED" or "THEFT LOCK". The radio theft deterrent system disables radio functionality if the VIN information sent by the BCM does not match the vehicle VIN information contained in the radio. The radio compares its learned VIN information to the VIN learned in the BCM via GMLAN. If a radio is replaced or swapped from another vehicle the radio will need to relearn the VIN information before it will function. The radio learns the VIN information during the SPS programming event.
RECOMMENDATION/INSTRUCTIONS
If the radio stills displays "LOCKED" or "THEFT LOCK" after SPS programming, then the radio will need to be replaced with one from an authorized Electronic Service Center (ESC).
WARRANTY INFORMATION
For vehicles repaired under warranty, please refer to the latest version of bulletin 06-08-47-001 for warranty information on control module reset/configuration.
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.