Restore Your GM Truck’s Electrical System with a Plug-and-Play Solution
Are you battling a cascade of strange electrical problems in your Cadillac Escalade, Chevy Silverado, or GMC Sierra? One moment the power windows work, the next they don’t. The A/C blower motor has a mind of its own, and a persistent airbag light stares back at you from the dash. These aren’t separate issues; they’re classic signs of a failing Body Control Module (BCM), the central command center for your vehicle’s body electronics. This genuine GM BCM, part number 20939138, is the definitive fix, arriving fully programmed to your vehicle’s VIN for a hassle-free, direct-fit replacement.
Forget about costly dealership appointments and programming fees. We handle the complex part for you. Simply provide your VIN during checkout, and our experts will flash the module with the latest GM software specific to your truck or SUV. This ensures all factory options and security systems communicate perfectly from the moment you plug it in. This is the most reliable way to solve those frustrating electrical gremlins and get your vehicle’s features working like new again. With this pre-programmed 2007-2011 Escalade Body Control Module, you’re not just buying a part; you’re buying a permanent solution.
From the Diagnostic Bay
I recently had a 2010 Silverado 2500 in the shop that was driving the owner crazy. The radio would cut out, the driver’s side door lock wouldn’t respond, and the HVAC controls were completely dead. The customer had already replaced the battery and checked fuses, but the problems were intermittent and seemed unrelated. After hooking up my scanner, I found a handful of communication codes pointing to the BCM. A failing Body Control Module can cause these ghost-like issues because it’s the hub for all these different systems. A poor internal ground or a failing processor inside the BCM creates a ripple effect. We installed a VIN-programmed module, and within 10 minutes, every single issue was resolved. It’s a common failure point on these GMT900 platforms, but thankfully, it’s a straightforward fix with the right part.
Is Your Truck Showing These Symptoms?
- ✔ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔ HVAC system failures, such as a non-responsive blower motor or climate controls.
- ✔ An active airbag warning light, often accompanied by diagnostic trouble code (DTC) B1001.
- ✔ The security system preventing the vehicle from starting or causing random stalling.
- ✔ Wipers or exterior lights turning on or off by themselves.
- ✔ Communication errors with other modules on the vehicle’s network.
A Straightforward Guide to Installation
Installing your new BCM is a simple process that most DIYers can complete in under 15 minutes with basic hand tools. The module is typically located under the driver’s side dash, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most GM trucks and SUVs from this era, the BCM is mounted to a bracket beneath the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM and remove it.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors firmly until they click into place.
- Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—windows, locks, lights, HVAC, etc.—to confirm the repair was successful.
Post-Installation Note: In some cases, if the airbag light was on, it may remain on after installation. This requires a ‘Setup SDM Primary Key in BCM’ procedure using a professional scan tool to sync the new BCM with the airbag system. Additionally, a brake pedal position relearn may be needed on certain models.
Verified Vehicle Compatibility
This module is a direct replacement for part number 20939138 and other interchangeable numbers on a wide range of General Motors vehicles. It is guaranteed to fit the following models, among others:
- Cadillac Escalade / ESV / EXT (2007-2011)
- Chevrolet Avalanche (2007-2011)
- Chevrolet Silverado 1500 / 2500 / 3500 (2007-2011)
- Chevrolet Suburban 1500 / 2500 (2007-2011)
- Chevrolet Tahoe (2007-2011)
- GMC Sierra 1500 / 2500 / 3500 & Denali (2007-2011)
- GMC Yukon / XL / Denali (2007-2011)
This part is also a direct replacement for part numbers: 25844480, 25835966, 15943678, 20939137, 22860591, and more. If you’re unsure about fitment, contact us with your VIN, and we’ll verify compatibility for your specific 2007-2011 Escalade Body Control Module needs.
Frequently Asked Questions
Do I need to take my vehicle to the dealer for programming?
No. This Body Control Module comes pre-programmed to your vehicle’s specific VIN. This allows for a simple plug-and-play installation without any need for expensive dealership tools or programming fees.
What happens if the airbag light is still on after I install it?
If the airbag light persists, it’s because the new BCM needs to be electronically ‘introduced’ to the existing Sensing and Diagnostic Module (SDM). This is done via a ‘Setup SDM Primary Key’ procedure, which can be performed by any competent repair shop with a professional-grade scan tool.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old module without any obligation to return it, saving you time and hassle.
Where is the BCM located on my 2008 Silverado?
On the 2007-2013 GM truck and SUV platform, including your Silverado, the BCM is located under the driver’s side of the dashboard, typically attached to a bracket near the steering column and parking brake pedal.
Will this fix my intermittent stalling problem?
While a faulty BCM can cause stalling by interfering with the vehicle’s security system or network communication, stalling can also be caused by other issues (fuel pump, crankshaft sensor, etc.). It’s important to properly diagnose the vehicle, but if stalling is combined with other electrical symptoms listed, the BCM is a very likely culprit.