Installation Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2005 Isuzu Ascender, 2005 GMC Envoy XUV, 2005 GMC Envoy XL, 2005 GMC Envoy, and 2005 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: BCM And Rear Electrical Center

Courtesy of GENERAL MOTORS CORP.

Index the slots on the BCM (1) to the rear electrical center.
Using a downward motion, install the BCM to the rear electrical center.

Fig 2: Connecting BCM Connectors

Courtesy of GENERAL MOTORS CORP.

Connect the 24-way gray electrical connector (1) to the BCM.
Connect the 32-way tan electrical connector (2) to the BCM.

Fig 3: View Of Body Wiring Extension From BCM

Courtesy of GENERAL MOTORS CORP.

Connect the 40-way body wiring extension (1) to the BCM.

Fig 4: Identifying Rear Electrical Center Locking Tab

Courtesy of GENERAL MOTORS CORP.

Engage the sliding latch fastening the BCM to the rear electrical center.
Slide the latch outboard until the locking tab (1) is fully seated.

Fig 5: View Of Rear Electrical Center Cover

Courtesy of GENERAL MOTORS CORP.

Install the rear electrical center cover.
If replacing the BCM on a Chevrolet TrailBlazer or GMC Envoy, position the left hand second seat to a passenger position.
If replacing the BCM on a Chevrolet TrailBlazer EXT or GMC Envoy XL, install the left second row seat. Refer to Seat Replacement - Rear No. 1 (TrailBlazer EXT, Envoy XL, Envoy XUV) in Seats.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
If installing a replacement BCM, program the BCM. Refer to Control Module References .