Yukon Denali AWD V8-6.2L (2007)
Body Control Module: All Technical Service Bulletins
Electrical - Various Electrical Malfunctions
Bulletin No.: 07-08-49-001
Date: January 18, 2007
TECHNICAL
Subject:
Various Electrical Concerns - Hood Open Message Displayed, Door Locks Inoperative, Brake Warning Lamp On (Replace BCM and Install Connector
Service Kit)
Models:
2007 Cadillac Escalade, Escalade ESV, Escalade EXT
2007 Chevrolet Avalanche, Suburban, Tahoe
2007 GMC Yukon, Yukon Denali, Yukon XL, Yukon Denali XL
Built Prior to the VIN Breakpoints shown.
Condition
Some customers may comment on various electrical concerns. Some of the conditions that may be present are:
Hood Open Message Displayed in DIC
Door Locks Inoperative
Brake Warning Lamp On
Cause
These conditions may be due to the engine cooling fans inducing a voltage spike that damages the BCM internally.
Correction
Replace the BCM and install connector service kit, P/N 25777448, at the BCM to prevent conditions from reoccurring. Use the service procedure listed
below.
Remove the push pin retainers and the left side closeout/insulator panel.
Remove the retaining screws and the steering column opening filler panel.
Remove the retaining bolts and the driver knee bolster.
Disconnect the BCM connectors.
Remove the BCM from its mounting bracket.
Install the new BCM to its mounting bracket.
Remove the BCM wiring harness clip to allow for slack.
Install diode # 1.
Locate BCM connector C4 (black).
