Programmed 2008-2012 Express 2500 BCM 15276271 Body Control Module

If your 2008-2012 Express 2500 Van is acting possessed—with flickering lights, a horn that won’t quit, or power windows with a mind of their own—the culprit is almost always a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen these exact issues countless times. The BCM is the central hub for your van’s body electronics, and when it goes, it can cause a cascade of frustrating and unpredictable problems.

Don’t let electrical gremlins put your workhorse out of commission. This is a direct-fit replacement BCM, part number 15276271, that arrives at your door fully programmed to your vehicle’s specific VIN. We handle the complex part, loading the latest GM software updates before we ship. This means you can skip the expensive trip to the dealership for programming. You get a reliable, ready-to-install solution that restores full functionality to your vehicle’s essential features.

A Technician’s Notebook

I once had a fleet customer bring in a 2011 Express 2500 cargo van. The complaint was intermittent no-start and a battery that would be dead every morning. The alternator and battery tested fine. After digging into the wiring diagrams, I noticed the retained accessory power (RAP) circuit was staying active long after the key was off, which pointed directly to the BCM. The internal relays were sticking. Swapping in a pre-programmed BCM like this one solved the parasitic draw instantly. It’s a classic failure mode for these modules, and a correct diagnosis saves hours of frustration.

Common Signs of a Failing BCM

A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:

✔ Erratic or non-functional interior and exterior lights.
✔ Power windows, door locks, or mirrors operating intermittently or not at all.
✔ The security system acting up, preventing the vehicle from starting (look for a flashing security light).
✔ Horn blowing randomly or not working when pressed.
✔ Dashboard warning lights appearing for no reason.
✔ Communication error codes, such as U0140, stored in other modules.

A Straightforward Guide to BCM Installation

Installing your new 2008-2012 Express 2500 BCM is a manageable job for a confident DIYer or any professional mechanic. The BCM is typically located in the center dash area.

Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
Locate the BCM: On the Express/Savana vans, the BCM is usually mounted to a bracket behind the center instrument panel trim. You will need to remove some dash panels for access.
Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket.
Install the New Module: Mount the new, pre-programmed BCM onto the bracket and securely reconnect all electrical connectors. Ensure they click into place.
Reconnect Power: Reattach the negative battery terminal.
Perform Post-Install Procedures: Start the vehicle and check all functions (lights, locks, windows). As noted below, certain relearn procedures may be necessary to clear warning lights like the airbag light.

Important Post-Installation Steps

Because this module is central to many systems, some vehicles may require additional steps after installation. A professional-grade scan tool is needed for these procedures.

✔ Airbag System Sync: If the airbag light is on after installation, a “Setup SDM Primary Key in BCM” procedure is required to sync the new BCM with the airbag system.
✔ Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light and traction control operation.
✔ No Core Charge: You are not required to return your old BCM. Feel free to keep it.

Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.

Verified Vehicle Compatibility

This module is a direct replacement for part number 15276271 and a wide range of other GM part numbers. It fits many vehicles, including but not limited to:

    ACADIA 07-12 | AVALANCHE 1500 10 | CAPRICE 11-13 | CAPTIVA SPORT 12 | CTS 08-13 | DTS 06-11 | ENCLAVE 08-12 | EQUINOX 07-09 | ESCALADE 10 | ESCALADE ESV 10 | ESCALADE EXT 10 | EXPRESS 1500 VAN 08-12 | EXPRESS 2500 VAN 08-12 | EXPRESS 3500 VAN 08-12 | G8 08-09 | HUMMER H2 08-09 | IMPALA 06-13 | LUCERNE 06-11 | MONTE CARLO 06-07 | OUTLOOK 07-10 | SAVANA 1500 VAN 08-12 | SAVANA 2500 VAN 08-12 | SAVANA 3500 VAN 08-12 | SRX 07-09 | STS 10 | SUBURBAN 1500 10 | TAHOE 10 | TORRENT 07-09 | TRAVERSE 09-12 | VUE 08-10 | YUKON 10 | YUKON XL 1500 10
This part replaces the following 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, 95151084.
    