Rainier AWD L6-4.2L VIN S (2005)
6. Engage the sliding latch fastening the BCM to the rear electrical center. Slide the latch outboard until the locking tab (1) is fully seated.
7. Install the rear electrical center cover.
8. If replacing the BCM on a Chevrolet TrailBlazer or GMC Envoy, position the left hand second seat to a passenger position.
9. If replacing the BCM on a Chevrolet TrailBlazer EXT or GMC Envoy XL, install the left second row seat.
10. Connect the negative battery cable.
11. If installing a replacement BCM, program the BCM. See: Testing and Inspection/Programming and Relearning
Body Wiring Harness Extension Replacement - BCM
BODY WIRING HARNESS EXTENSION REPLACEMENT - BCM
REMOVAL PROCEDURE
IMPORTANT:
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The ignition switch should be in the OFF position when connecting or disconnecting the connectors to the body control module (BCM).
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Always disconnect the 40-way body wiring extension FIRST, the 32-way tan connector SECOND and the 24-way gray electrical connector LAST.
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Always connect the 24-way gray electrical connector FIRST, the 32-way tan connector SECOND and the 40-way body wiring extension LAST.
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The BCM can set DTCs with the ignition switch in the OFF position. The BCM has battery run down protection for the courtesy lamp circuit. The
BCM battery run down protection cannot detect shorts on inputs or other circuits which the BCM does not control. Use the scan tool in order to
activate the POWER DOWN NOW mode. Use the POWER DOWN NOW mode in order to check for current draws on circuits that are not
controlled by the BCM, or controlled by the battery run down protection system.
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Do not touch the exposed electrical contacts of the body wiring extension.
1. Disconnect the negative battery cable.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
2. If replacing the body wiring harness extension on a Chevrolet TrailBlazer EXT or GMC Envoy XL, remove the left second row seat.
3. If replacing the body wiring harness extension on a Chevrolet TrailBlazer or GMC Envoy, position the left hand second seat to a cargo position.
4. Remove the rear electrical center cover.
