Are you chasing down frustrating electrical problems in your GM truck or SUV? One moment the power windows work, the next they don’t. Maybe your dash lights are flickering, the radio is acting possessed, or worse, the security system is preventing your truck from starting. As a technician with over 20 years of experience, I’ve seen these exact gremlins hundreds of times, and the culprit is often a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of confusing and intermittent issues that are a nightmare to diagnose. Stop throwing parts at the problem. This is the direct, reliable solution to restore your vehicle’s functionality and your peace of mind. We offer a professionally prepared 2012-2014 Sierra 3500 BCM that arrives at your door programmed and ready for installation.
Case Study: A Tricky Diagnosis
A 2013 Silverado 2500 came into my bay with a list of bizarre symptoms. The owner complained of the dome light staying on, the driver’s side power lock not working, and an intermittent ‘Service StabiliTrak’ message. His local mechanic had already replaced the door lock actuator and a battery with no success. A quick scan showed a slew of communication codes, including U0140 (Lost Communication With Body Control Module). Instead of a complex wiring issue, my experience pointed straight to the BCM. After installing a pre-programmed module like this one, all symptoms vanished instantly. It saved the customer hundreds in diagnostic fees and unnecessary parts.
Common Signs of a Failing BCM
If your vehicle is experiencing any of the following, a faulty BCM is the likely cause. This module is the definitive fix for these issues.
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights (headlights, taillights, dome lights) behaving strangely.
- ✔ The security system or keyless entry failing to work correctly.
- ✔ A ‘no-start’ condition where the engine cranks but won’t fire due to a security fault.
- ✔ Unexplained warning lights on the dashboard, such as for the airbag or traction control system.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, like U0140, U0155, or B1001.
A Straightforward Guide to Installation
Getting your truck back to normal is easier than you think. This module is located under the driver’s side of the dashboard, near the steering column. While professional installation is always an option, a confident DIYer can handle this job.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Access the Module: Remove the lower dash panel beneath the steering wheel to expose the BCM. It’s typically held in a bracket with a few small bolts or clips.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be pressed to release. Once disconnected, remove the old BCM from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM into the bracket and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Post-Installation Checks: Reconnect the battery. Start the vehicle and test all functions: windows, locks, lights, radio, etc. In most cases, you’re done!
Important Note on Relearn Procedures: In some vehicles, additional steps may be required. If your airbag light is on, a scan tool procedure called ‘Setup SDM Primary Key in BCM’ is needed. Similarly, a ‘Brake Pedal Position Relearn’ might be necessary for proper brake light and traction control operation. These are standard procedures for any professional technician.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 22846364, 22737275, and 22846365. It is guaranteed to fit the following GM models:
- ✔ 2012-2014 Cadillac Escalade, Escalade ESV, Escalade EXT
- ✔ 2012-2013 Chevrolet Avalanche 1500
- ✔ 2012-2013 Chevrolet Silverado 1500 / 2500 / 3500 Pickup
- ✔ 2014 Chevrolet Silverado 2500 / 3500 Pickup
- ✔ 2012-2014 Chevrolet Suburban 1500
- ✔ 2012-2013 Chevrolet Suburban 2500
- ✔ 2012-2014 Chevrolet Tahoe
- ✔ 2012-2013 GMC Sierra 1500 / Denali 1500
- ✔ 2012-2014 GMC Sierra 2500 / 3500 & Denali 2500 / 3500 Pickup
- ✔ 2012-2014 GMC Yukon & Yukon XL 1500
- ✔ 2012-2013 GMC Yukon XL 2500
To ensure a perfect match, simply provide your vehicle’s VIN during checkout. We’ll handle the programming with the latest GM software, so it’s ready to install right out of the box. Plus, there is no core charge—you can keep your old part!
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We program the module to your vehicle’s specific VIN before shipping. It arrives ready to install, saving you the time, cost, and hassle of a dealership visit.
Where is the BCM located on my 2013 Sierra?
The Body Control Module is located under the driver’s side dashboard, typically to the left of the steering column. You will need to remove the lower dash panel to access it.
What tools are required for installation?
Basic hand tools are all that’s needed for the physical installation, such as a socket set and a panel removal tool. No special programming tools are required on your end for the initial setup.
What if my airbag light comes on after I install it?
This is uncommon but can happen. It means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Is there a core charge for this part?
No, there is absolutely no core charge. You are not required to send your old, faulty BCM back to us.
Will this fix my power window and lock problems?
Yes, the BCM directly controls the power windows, door locks, and many other body accessories. If you’re experiencing erratic behavior with these systems, a failing BCM is the most common cause, and this part is the correct solution.