If you’re dealing with bizarre electrical issues in your 2012-2013 Silverado 1500, you know the frustration. One day the power locks don’t work, the next the radio acts up, or you’re getting random warning lights on the dash. As a technician with over two decades of experience, I’ve seen these exact symptoms hundreds of times, and they almost always point to a failing Body Control Module (BCM). The BCM is the central hub for your truck’s body electronics, and when it starts to fail, it creates a cascade of confusing problems.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take a genuine GM module and program it with the latest official software, specifically coded to your truck’s unique Vehicle Identification Number (VIN). This means you can skip the expensive trip to the dealership for programming. You get a component that’s ready to install right out of the box, restoring the critical functions you rely on every day.
Case Study: A Tricky Diagnosis
A customer brought in a 2013 Sierra 2500 with a complaint that stumped two other shops: intermittent no-start and the security light would flash randomly. The battery was new, and the starter checked out. When I connected my scan tool, I found a slew of ‘Loss of Communication’ codes (U-codes) with various modules. Instead of chasing each code, I went straight to the network hub—the BCM. By monitoring data, I saw the BCM was erratically dropping offline, causing the security system to immobilize the engine. A new, properly programmed BCM solved all the issues in one shot. This is a classic BCM failure scenario.
Is Your Truck Exhibiting These BCM Failure Symptoms?
A failing BCM can cause a wide range of problems that seem unrelated. If you’re experiencing any of the following, a faulty Body Control Module is the likely culprit:
- ✔ Power windows, mirrors, or door locks operating intermittently or not at all.
- ✔ Interior dome lights or exterior lights staying on or not turning on.
- ✔ The security system light is illuminated, or the vehicle won’t start.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Inaccurate or erratic gauge cluster readings.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or U0100.
- ✔ Wipers turning on by themselves or not responding to the switch.
A Straightforward Guide to Installation
Replacing the BCM on these GM trucks is a manageable job for a DIYer with basic tools. The key is our pre-programming service, which handles the most complex part for you.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all systems to power down completely.
- Locate the BCM: The Body Control Module is typically located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the multiple wiring harnesses connected to the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all wiring harnesses, ensuring each one clicks firmly into place.
- Reconnect Power: Reattach the negative battery terminal. Your truck’s core functions should now be restored.
Important Post-Installation Steps
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ procedure after installation. These are straightforward for a shop or an advanced DIYer with a capable bidirectional scan tool.
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn might be required to ensure correct brake light and traction control operation.
- No Core Charge: You don’t need to send your old part back. This saves you time and money on core fees and return shipping.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual for procedures specific to your truck.
Verified Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part numbers 22846364, 22737275, and 22846365. It is guaranteed to fit the following vehicles:
- Cadillac Escalade / ESV / EXT: 2012-2014
- Chevrolet Avalanche 1500: 2012-2013
- Chevrolet Silverado 1500 Pickup: 2012-2013
- Chevrolet Silverado 2500 / 3500 Pickup: 2012-2014
- Chevrolet Suburban 1500 / 2500: 2012-2014
- Chevrolet Tahoe: 2012-2014
- GMC Sierra 1500 Pickup: 2012-2013
- GMC Sierra 2500 / 3500 Pickup: 2012-2014
- GMC Sierra Denali 1500 / 2500 / 3500: 2012-2014
- GMC Yukon / Yukon XL 1500 / Yukon XL 2500: 2012-2014
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. The main benefit of our service is that we program the module to your vehicle’s VIN before we ship it. This saves you the time, cost, and hassle of a dealership visit.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot program and ship the module without it. You can typically find your VIN on your driver’s side door jamb sticker or on the dashboard viewable through the windshield.
What is a Body Control Module (BCM)?
The BCM is a computer in your truck that manages a wide array of non-engine related functions. This includes power windows, locks, lights, wipers, the security system, and more. It acts as the central command for passenger comfort and convenience features.
What if my airbag light is on after I install it?
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’ must be performed with a professional-grade scan tool to resolve this.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your original module, which saves you the cost and effort of shipping it back.