Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Module, Body Control (BCM): Installation
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, Occupant Classification System (OCS), seat belt tensioner, impact sensor or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to follow these instructions may result in accidental airbag deployment.
- If removed, install the BCM to the mounting bracket. Install the fastener (1) and tighten the screw to the proper torque specification. Refer to TORQUE SPECIFICATIONS .
- Position the BCM with mounting brackets to the instrument panel support structure outboard of the steering column as a unit and connect the wire harness connectors (1) to the back of the BCM.
- Install the fasteners (1) that secure the BCM and BCM mounting bracket to the instrument panel support structure. Tighten the screws to the proper torque specification. Refer to TORQUE SPECIFICATIONS .
- Connect the wire harness connectors (1) to the BCM.
- Install the left lower A-Pillar extension/sill plate trim.
- Install the steering column opening cover to the instrument panel. Refer to COVER, STEERING COLUMN OPENING, INSTALLATION .
- Connect the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), connect the IBS connector to the negative battery cable.
- Using the scan tool, perform the "IBS calibration" routine. If this is not completed, the Electronic STOP/START (ESS) function will not operate.
- If this Electronic Control Unit (ECU) is being replaced with a new unit, programing of the BCM is required. Refer to MODULE, BODY CONTROL (BCM), MODULE PROGRAMMING .
If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to determine if alignment of the PROXI configuration data into the new ECU is needed. If PROXI alignment is needed, follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under the Guided Diagnostics menu.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.