Tired of Your Caprice’s Electrical Gremlins?
Is your 2011-2013 Chevrolet Caprice acting possessed? One minute the power windows work, the next they don’t. Maybe the radio cuts out randomly, the security light is flashing, or the interior lights have a mind of their own. As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of times. More often than not, the culprit is a failing Body Control Module (BCM)—the central nervous system for your vehicle’s comfort and convenience features.
From the Diagnostic Bay: The Case of the Confused Caprice
A fleet manager brought in a Caprice PPV that was a nightmare for his officers. The dome light would stay on, draining the battery, and the key fob would only work sporadically. His mechanics had already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a slew of U-codes (communication errors), all pointing to a network problem. Instead of spending hours tracing wires, I went straight to the BCM. A quick swap with a known-good unit confirmed my diagnosis. A failing BCM can send confusing signals across the vehicle’s network, causing dozens of unrelated symptoms. This pre-programmed module is the exact solution we used to get that patrol car reliably back in service the same day.
Is Your Vehicle Showing These Signs of BCM Failure?
A faulty BCM can cause a wide range of frustrating issues. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off.
- ✔ Malfunctioning keyless entry and security system alerts.
- ✔ Intermittent issues with the radio or climate control system.
- ✔ Dashboard warning lights flickering without a clear cause.
- ✔ Communication error codes, such as U0140 (Lost Communication With Body Control Module).
The Simple, Reliable Fix: A VIN-Programmed 2011-2013 Caprice BCM
Don’t waste time and money at the dealership. We take the guesswork and hassle out of the repair. Simply provide your vehicle’s VIN during checkout, and our experts will program this module with the latest GM software specific to your Caprice. It arrives at your door ready for installation, eliminating the need for expensive scan tools or a trip to the dealer for programming. This is the most efficient way to restore your car’s electronic functions correctly the first time.
A Straightforward Guide to Installation
Replacing the BCM in your Caprice is a manageable job for a DIYer with basic tools. The BCM is typically located behind the dashboard.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Access the Module: Carefully remove the necessary dash panels to gain access to the BCM. Its exact location is noted in your service manual.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM and securely reconnect all electrical connectors. Ensure they click into place.
- Final Steps: Reassemble your dashboard and reconnect the battery terminal. Start the vehicle to confirm that the issues are resolved.
Important Post-Installation Information
While this module is programmed for your VIN, 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 light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the safety systems and is only required if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure proper brake light and traction control operation.
- No Core Charge: You are not required to return your old module. Keep it, or dispose of it responsibly.
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 Body Control Module is a direct replacement for part number 20921436 and other part numbers listed below. It is guaranteed to fit the following models:
- Chevrolet Caprice: 2011, 2012, 2013
- Cadillac CTS: 2008-2013
- Cadillac DTS: 2006-2011
- Chevrolet Impala: 2006-2013
- GMC Acadia / Chevy Traverse / Buick Enclave / Saturn Outlook: 2007-2012
- Chevy Express / GMC Savana Vans: 2008-2012 (verify options)
- Chevy Tahoe / Suburban / Avalanche, GMC Yukon, Cadillac Escalade: 2010 (verify ID)
- …and many other GM vehicles as listed in the original fitment data. Please match your part number to ensure compatibility.
This module replaces the following 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, 95151084
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipment. Just provide your VIN at checkout, and the module will arrive ready to install.
Is this a difficult part to replace for a DIYer?
For someone with basic mechanical skills, it’s a manageable job. The main challenge is accessing the module behind the dashboard. No special programming tools are required on your end.
What if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool, which a local repair shop can perform.
Do I have to send my old BCM back?
No. There is absolutely no core charge or need to return your original part.
Will this fix my specific electrical problem?
This BCM resolves the most common electrical failures related to lights, locks, windows, and security systems. If your vehicle’s symptoms match the ones listed, there is a very high probability this is the correct fix.