Restore Full Functionality to Your GM Truck or SUV
Are you dealing with baffling electrical issues in your Cadillac, Chevy, or GMC? Flickering lights, malfunctioning power windows, a radio with a mind of its own, or a persistent ‘Service StabiliTrak’ message can all point to one culprit: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can turn your reliable truck into a source of daily frustration. This isn’t just an inconvenience; it can be a safety concern when essential systems like lighting and security become unpredictable.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealership hassle out of the equation. Before we ship, our technicians will program this BCM with the latest GM software, specifically matched to your vehicle’s VIN. This ensures that when it arrives, it’s ready to communicate perfectly with your truck’s other modules, restoring the seamless operation you expect from your vehicle. Get back the reliability and peace of mind you deserve with a properly functioning 2012-2013 Escalade EXT BCM.
A Technician’s Notebook: The Ghost in the Sierra
I once had a 2013 Sierra 2500 in the bay that was driving its owner crazy. The dome lights would stay on, the driver’s side window would only work intermittently, and the remote start failed half the time. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a slew of communication errors (U-codes) pointing to the BCM. These modules are notorious for causing these ‘ghost’ problems that seem unrelated. We installed a VIN-programmed BCM, and instantly, all the gremlins vanished. It’s a classic case where one central component failure creates a cascade of confusing symptoms.
Is Your Vehicle Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system or keyless entry failing to work correctly.
- ✔ Unexplained warning lights on the dashboard, such as for the airbag or traction control system.
- ✔ Communication Diagnostic Trouble Codes (DTCs), often in the U-series (e.g., U0140, U0155).
- ✔ Intermittent no-start conditions where the engine cranks but won’t fire up.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a confident DIYer. The module is typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most of these GM trucks and SUVs, you’ll find the BCM mounted to a bracket or junction block under the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the multiple 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 location.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. Ensure they click into place.
- Reconnect Power: Re-attach the negative battery terminal. The vehicle will now power up with the new BCM.
- Perform Post-Install Checks: Start the vehicle and test all body functions—lights, windows, locks, etc. Note that some relearn procedures may be necessary as detailed below.
Important Post-Installation Information
While this BCM is programmed for your VIN, your vehicle’s systems may require a final handshake. An Airbag System Sync (‘Setup SDM Primary Key in BCM’) might be needed with a professional scan tool if the airbag light is on. Additionally, a Brake Pedal Position Relearn may be required on some models to ensure proper brake light and stability control function. Always refer to a factory service manual for your specific model’s requirements.
Guaranteed Fitment for Your GM Truck
This module, part number 22846364, is a direct replacement for part numbers 22737275 and 22846365. It is compatible with a wide range of GM vehicles. Please match your part number or vehicle from the list below:
- Cadillac Escalade / ESV / EXT: 2012, 2013, 2014
- Chevy Avalanche 1500: 2012, 2013
- Chevy Silverado 1500 / 2500 / 3500: 2012, 2013, 2014
- Chevy Suburban 1500 / 2500: 2012, 2013, 2014
- Chevy Tahoe: 2012, 2013, 2014
- GMC Sierra 1500 / 2500 / 3500 (including Denali): 2012, 2013, 2014
- GMC Yukon / Yukon XL (including Denali): 2012, 2013, 2014
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the brain for your vehicle’s electronic accessories. It controls functions like power windows, locks, lights, the security system, and the radio, ensuring they all work together.
Why do you need my VIN number?
We require your Vehicle Identification Number (VIN) to program the BCM with the correct software and settings for your specific vehicle’s options. This makes the installation process much smoother and avoids a costly trip to the dealership for programming.
Is this part difficult to install myself?
For someone with basic mechanical skills, this is a very manageable task. The BCM is located under the driver’s dash and involves unplugging the old unit and plugging in the new one. No special tools are typically required for the swap itself.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ will need to be performed by a mechanic with a professional-grade diagnostic tool to resolve it.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of return shipping.