2002 – 2005

Restore Full Control Over Your GM Truck or SUV’s Electronics

Are you battling frustrating electrical gremlins in your GM vehicle? Flickering lights, power windows with a mind of their own, door locks that don’t respond, or a security light that won’t turn off are all classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body accessories, a faulty BCM can make your daily drive a nightmare. In my 20+ years of diagnostics, I’ve seen how a single failing module can mimic a dozen different problems, leading to wasted time and money on incorrect repairs. This is the definitive solution.

This isn’t just a replacement part; it’s a fully integrated, ready-to-install solution. We take the hassle and high cost of dealership visits out of the equation. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this 2002-2005 GM BCM with the latest GM software specific to your truck or SUV. It arrives at your door ready to be installed, restoring the precise functionality you’ve been missing.

Common Signs of a Failing BCM

If your vehicle is exhibiting these issues, a faulty BCM is the most likely culprit. Replacing it with our pre-programmed unit can resolve:

• ✔ Erratic or non-functional power windows, mirrors, and door locks.
• ✔ Interior or exterior lights that stay on or don’t work at all.
• ✔ The security or anti-theft light flashing, preventing the engine from starting.
• ✔ Horn sounding unexpectedly or not working when pressed.
• ✔ Inaccurate or dead gauges on the instrument cluster.
• ✔ False warnings on the driver information center (e.g., “Service Vehicle Soon”).

A Straightforward Guide to Installation

Installing your new 2002-2005 GM BCM is a manageable job for a DIY enthusiast or a quick task for any professional mechanic. Follow these general steps for a successful replacement.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
2. Locate the BCM: On most of these GM models, the BCM is located under the driver’s side of the dashboard, often near the steering column or behind a kick panel. On vans like the Astro and Safari, it’s typically found behind the center dash panel.
3. Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
4. Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. Ensure they click into place.
5. Reconnect Power: Reattach the negative battery terminal.
6. Perform Final Procedures: Turn the key to the ‘ON’ position. You will need to perform the required post-install procedures noted below to ensure full system integration.

Important: Post-Installation Relearn Procedures

After installing your new BCM, two critical steps are required to ensure all vehicle systems communicate correctly and function safely. Failure to perform these steps can result in warning lights and compromised safety features.

1. Airbag System (SRS) Reset: The airbag light will likely be illuminated after replacement. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM). Most professional repair shops can perform this service.

2. Brake Pedal Position Sensor Calibration: Some vehicles require the Brake Pedal Position (BPP) sensor to be recalibrated. This ensures the brake lights and stability control system receive accurate input from the pedal. This is also done with a capable diagnostic scan tool.

Verified Vehicle Compatibility

This module is a direct-fit replacement for the following vehicles and part numbers. Please match your part number or vehicle to ensure compatibility. This unit replaces part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU.