Restore Your Vehicle’s Electrical System with a Plug-and-Play BCM

Are you chasing down electrical gremlins in your GM vehicle? Flickering lights, malfunctioning power windows, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). As a technician with over 20 years of experience, I’ve seen how a bad BCM can turn a reliable car, truck, or van into a source of constant frustration. This isn’t just an inconvenience; it affects your vehicle’s core functions and safety. This GM Body Control Module is the definitive solution, arriving at your door programmed with the latest GM software specifically for your vehicle’s VIN.

Common Signs of a Failing BCM

If your vehicle is exhibiting any of these symptoms, a faulty BCM is the likely culprit. Replacing it can be the most direct path to a reliable fix.

• ✔ Erratic or non-functional interior and exterior lights.
• ✔ Power windows, door locks, or mirrors working intermittently or not at all.
• ✔ The anti-theft or security system engaging incorrectly, causing no-start conditions.
• ✔ Dashboard warning lights (like the airbag light) illuminating for no reason.
• ✔ A/C and climate control functions behaving erratically.
• ✔ Diagnostic trouble codes (DTCs) related to lost communication, such as U0140, U0155, or other U-codes.

A Straightforward Guide to Installation

One of the biggest benefits of this module is that it comes pre-programmed, making installation manageable for a DIYer or a professional mechanic. While the exact location varies, the process is generally similar.

1. Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before starting work.
2. Locate the BCM: On most of these GM models, the BCM is located inside the cabin, often under the driver’s or passenger’s side of the dashboard, or behind the center console. A quick search for your specific model will confirm its location.
3. Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
4. Install the New Module: Mount the new GM Body Control Module in place and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock in.
5. Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and test all body functions: lights, locks, windows, radio, etc.
6. Perform Relearns (If Needed): As noted below, some vehicles may require a simple relearn procedure for the brake pedal position sensor or airbag system. In many cases, the vehicle will operate correctly without these extra steps.

Post-Installation Considerations

Your new BCM is ready to go, but depending on your vehicle’s specific configuration, a couple of items may need attention. There is no core charge, so you can keep your old part. After installation, if the airbag light is on, a ‘Setup SDM Primary Key in BCM’ procedure is required using a pro-level scan tool. Additionally, some models may need a Brake Pedal Position Relearn to ensure proper brake light and traction control operation. Always refer to a service manual for your specific vehicle if you are unsure.

Verified Vehicle Compatibility

This GM Body Control Module is a direct replacement for a wide range of vehicles and part numbers. Please verify your vehicle is on the list below. This unit is a replacement for part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084.