If you’re dealing with bizarre electrical gremlins in your 2012-2013 GMC Sierra Denali 1500, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of constant frustration. One minute your power windows work, the next they don’t. The radio might shut off randomly, or you could be facing a no-start situation. These aren’t just annoyances; they’re signs that your truck’s electronic nerve center is compromised.
This isn’t just a replacement part; it’s a complete solution. We take a genuine GM-spec BCM, compatible with part number 22846364 (as well as 22737275 and 22846365), and pre-program it specifically to your truck using your Vehicle Identification Number (VIN). This critical step ensures all your vehicle’s options are recognized and function correctly right out of the box. We flash it with the latest stable software release from GM, which often corrects the very issues that caused the original module to fail. This means you skip the expensive trip to the dealership for programming and avoid the hassle of coordinating with a local shop. You get a reliable, plug-and-play fix delivered to your door.
Is Your Truck Showing These Telltale Signs?
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ Radio or infotainment system behaving erratically or not turning on.
- ✔ Security system faults or the truck refusing to start (anti-theft light flashing).
- ✔ Unexplained battery drain that leaves you with a dead battery overnight.
- ✔ False warning messages on the driver information center (DIC).
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or other U-codes.
From the Diagnostic Bay: The Case of the Ghostly Gremlins
A customer brought in his 2013 Silverado 2500, convinced it was haunted. The dome lights would flicker, the horn would chirp randomly when locking, and sometimes the driver’s side window wouldn’t roll down. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a slew of communication loss codes with the BCM. Instead of just ordering a blank module and charging him for two hours of programming and setup, we opted for a pre-programmed unit. The swap took less than 30 minutes, and every single issue was resolved instantly. This is the power of a VIN-matched solution—it turns a complex electronic diagnostic into a straightforward component replacement.
A Straightforward Guide to Your BCM Swap
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electronic components.
- ✔ Locate the BCM: On most of these GM trucks and SUVs, the Body Control Module is located under the driver’s side of the dashboard, usually to the left of the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be pressed to release. Once all connectors are free, unbolt or unclip the old BCM from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting) and test all body functions: lights, locks, windows, radio, etc.
- ✔ Post-Installation Checks: Start the vehicle. As noted in our policies, some vehicles may require a ‘Brake Pedal Position Relearn’ or an ‘Airbag System Sync’ if the SRS light is on. These procedures typically require a professional-grade scan tool.
By choosing this pre-programmed 2012-2013 Sierra Denali BCM, you are not just buying a part; you are buying a streamlined, professional-grade repair process that saves you time, money, and the headache of a dealership visit.
Verified Vehicle Compatibility List
This module is a direct fit for a wide range of GM trucks and SUVs. Please verify your vehicle is on this list. Upon purchase, we will require your VIN to ensure perfect programming.
AVALANCHE 1500 (12-13) | ESCALADE, ESV, EXT (12-14) | SIERRA & SILVERADO 1500 (12-13) | SIERRA & SILVERADO 2500/3500 (12-14) | SIERRA DENALI 1500/2500/3500 (12-14) | SUBURBAN 1500/2500 (12-14) | TAHOE (12-14) | YUKON & YUKON XL 1500/2500 (12-14)
Part Number Interchange: 22737275, 22846365, 22846364
Frequently Asked Questions
Frequently Asked Questions
What exactly does a Body Control Module (BCM) do?
The BCM is essentially the brain for your vehicle’s non-engine related electronics. It controls functions like power windows, power locks, interior and exterior lighting, the security system, and the radio. When it fails, these systems can become unreliable.
Why do you need my VIN number?
Your vehicle’s VIN is like its fingerprint. It tells us the exact options your truck was built with (e.g., power folding mirrors, specific lighting packages). We use the VIN to program the BCM so that it works seamlessly with your specific vehicle features, eliminating the need for dealer programming.
Is this a difficult part to install for a DIYer?
For someone with basic mechanical skills, this is a very manageable job. The module is typically located under the dash and held in by a few clips or bolts. The main challenge is accessing it. Since our module comes pre-programmed, you avoid the complex software side of the repair.
What is a core charge? Do I need to send my old part back?
There is absolutely no core charge for this part. You can keep your old module, which simplifies the process for you. No need to worry about packaging and shipping the old one back to us.
My airbag light came on after installation. What should I do?
This is an uncommon but known possibility. If the SRS/airbag light is on, the vehicle’s computer systems need to be re-synced. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Any competent repair shop can perform this for you.
Will this fix my check engine light?
Generally, no. The BCM controls body electronics, while the Engine Control Module (ECM) or Powertrain Control Module (PCM) manages engine and transmission functions that trigger the check engine light. If your primary issue is a check engine light, you may need a different computer.