PIT4474D

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIT4474D
March, 2013
PRELIMINARY INFORMATION
Subject:
Navigation or Radio Display Blank Or Flashing DTC B1265 B1288 Or B1289
Models:
2007-2013 Cadillac Escalade Models
2007-2013 Chevrolet Avalanche, Silverado, Suburban, Tahoe
2007-2013 GMC Sierra, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL
This PI was superseded to update condition field. Please discard PIT4474C.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment of one or all of the following concerns:
– Navigation or radio screen is blank or flashes on and off
– No sound from speakers
– Rear DVD screen inoperative
– DTC B1265, B1288 Or B1289
– Navigation disclaimer message intermittently will be displayed (see below)
2901600
This condition may be caused by the remote enable signal wire circuit 7066 being shorted to ground. This remote
enable signal comes from the radio and feeds the Amplifier (except vehicles with RPO Y91 or any 2009 and later
Chevrolet Utility equipped with RPO STZ), the antenna module (utilities only), and the rear video display (with
RPO U42).
Note: When the remote enable signal wire (Circuit 7066) is first shorted to ground, the navigation screen or radio
display may start to flash. If the wire remains shorted for more than 2 minutes, the navigation or radio display goes
blank. The radio's current limiting logic will not re-enable the output on the entertainment remote enable circuit until
after the radio performs a full power–down. It may be necessary to wait 5 minutes with the key OFF and retained
accessory power OFF for the radio to re-enable this output.
Recommendation/Instructions
If you experience this concern, check for a short to ground on the remote enable signal wire (Circuit 7066) and repair
and re-route the circuit as needed. The most common area of concern is a shorted wiring harness near the rear DVD
display screen under the headliner.
Warranty Information
For wiring repairs covered under warranty, please refer to latest version of bulletin 10-00-89-005 for warranty
information on wire/connector repairs.
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.