Tired of Chasing Electrical Gremlins in Your GM Vehicle?
As a technician with over two decades under the hood, I’ve seen it all. A customer comes in with a car that seems possessed—windows have a mind of their own, the security light flashes for no reason, or the car intermittently refuses to start. More often than not, the root cause isn’t a dozen different problems; it’s one: a failing Body Control Module (BCM). The BCM is the electronic nerve center for your vehicle’s comfort and security features. When it goes, the symptoms can be baffling and frustrating. This is the definitive solution.
This isn’t just a part in a box. This is a complete, ready-to-install solution for your vehicle. We utilize a professional cloning service, which means we transfer the essential programming and security data from your original, failing BCM directly to this replacement unit. The result? A true plug-and-play module that saves you from a costly trip to the dealership for programming. Just send us your old module, and we’ll ship it back to you along with your fully programmed replacement.
Common Signs of a Failing BCM
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ The security or anti-theft system light stays on, preventing the car from starting.
- ✔ Inaccurate gauge readings or dashboard warning lights that appear without cause.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
- ✔ Wipers, horn, or remote keyless entry working erratically or not at all.
A Technician’s Notebook: The Impala That Wouldn’t Behave
I remember a 2012 Impala that drove a local shop crazy for a week. The complaint was that the radio and interior lights would flicker randomly, and sometimes the key fob wouldn’t work. They had already replaced the battery and checked all the grounds. After they brought it to my bay, I saw the classic signs. A quick scan showed multiple communication loss codes pointing to the BCM. Instead of a complicated dealer repair, we used a cloned 2011-2013 Caprice BCM (which shares the same architecture). The customer sent in their old unit, we cloned it, and sent it back. The shop plugged it in, and every single issue was resolved instantly. No programming, no extra labor—just a solid, reliable fix.
A Straightforward Guide to Installation
Installing your newly programmed BCM is a manageable job for a confident DIYer or any professional technician. While the exact location varies by model, here is a general guide.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most supported models like the Impala, Acadia, or Traverse, the BCM is located on the driver’s side, under the dashboard, often near the steering column. For Express/Savana vans, it’s typically behind the center dash.
- Remove Trim Panels: You may need to remove a few plastic trim panels or a lower dash cover to gain access. These are usually held by clips or a few small screws.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount the new, cloned BCM in place and securely re-plug all the electrical connectors. You’ll hear a click as they lock in.
- Reconnect and Test: Reattach the trim panels, reconnect the negative battery terminal, and start the vehicle. Test all functions: lights, locks, windows, radio, etc., to confirm the repair.
Important Post-Installation Information
Our cloning service handles the vast majority of the setup, but some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new module.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly.
- Disclaimer: Always refer to a factory service manual for your specific vehicle for the most accurate procedures. If you are unsure, consult a qualified automotive technician.
Verified Vehicle Compatibility
This BCM is a direct replacement for a wide range of General Motors vehicles. It is compatible with part number 20815898 and many others. While the primary listing is for the 2011-2013 Caprice BCM, it also fits models such as:
- 2007-2012 Acadia
- 2011-2013 Caprice
- 2012 Captiva Sport
- 2008-2013 CTS
- 2006-2011 DTS
- 2008-2012 Enclave
- 2007-2009 Equinox
- 2008-2012 Express & Savana Vans (1500/2500/3500)
- 2008-2009 Hummer H2
- 2006-2013 Impala
- 2006-2011 Lucerne
- 2006-2007 Monte Carlo
- 2010-2013 Tahoe, Suburban, Yukon, Escalade (verify by ID)
- 2009-2012 Traverse
Note: This is not an exhaustive list. Please match your original part number to the list provided or contact us with your VIN to confirm fitment.