If you’re dealing with a storm of bizarre electrical problems in your GM truck or SUV, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable workhorse into a source of constant frustration. One minute your power windows won’t work, the next your security light is flashing, or the truck refuses to start. These aren’t separate issues; they’re symptoms pointing to a single culprit: a faulty BCM.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take this genuine GM BCM, compatible with part numbers 22846364, 22737275, and 22846365, and professionally program it to your vehicle’s specific Vehicle Identification Number (VIN). This means it arrives at your door ready for installation, loaded with the latest GM software updates. You get to skip the expensive dealership visit, avoid programming fees, and get your truck back to full functionality without the headache.
Case Study: A Tricky Diagnosis
I remember a 2013 Silverado 2500 that came into the shop with a laundry list of complaints from the owner. The radio would randomly shut off, the dome light would stay on, and the power locks worked intermittently. The owner had already replaced the battery and checked all the fuses. A scan showed a handful of communication codes, including the notorious U0140 (Lost Communication With Body Control Module). Instead of chasing each individual problem, we went straight for the central hub. Installing a pre-programmed 2012-2014 Sierra 2500 BCM like this one resolved every single issue in one go. It’s a classic example of how this single module can be the key to restoring order.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ The security system light is on, or the alarm goes off randomly.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Intermittent no-start conditions, especially with a security message.
- ✔ Common diagnostic trouble codes (DTCs) like U0140, B1001, or other communication faults.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most of these GM trucks and SUVs, the BCM is 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 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 bracket.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, etc.—to confirm the repair.
- ✔ Perform Relearns (If Needed): As noted below, some vehicles may require a ‘Setup SDM Primary Key’ or ‘Brake Pedal Position Relearn’ procedure if specific warning lights appear. This typically requires a high-end scan tool.
Important Post-Installation Information
This module is designed to be a direct-fit solution, but due to the complexity of modern vehicle systems, a couple of additional steps may be necessary in some cases:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This syncs the new BCM with the airbag system and must be done with a professional-grade diagnostic tool.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn might be required to ensure your brake lights and traction control system function correctly.
- No Core Charge: We make it simple. There is absolutely no core charge on this BCM. You can keep your old part.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any part of the process.
Verified Vehicle Compatibility
This Body Control Module is a confirmed fit for a wide range of General Motors trucks and SUVs. Please verify your part number or vehicle in the list below. This unit replaces part numbers 22846364, 22737275, and 22846365.
- AVALANCHE 1500 12-13
- ESCALADE 12-14
- ESCALADE ESV 12-14
- ESCALADE EXT 12-13
- SIERRA 1500 PICKUP 12-13
- SIERRA 2500 PICKUP 12-14
- SIERRA 3500 PICKUP 12-14
- SIERRA DENALI 1500 12-13
- SIERRA DENALI 2500 12-14
- SIERRA DENALI 3500 12-14
- SILVERADO 1500 PICKUP 12-13
- SILVERADO 2500 PICKUP 12-14
- SILVERADO 3500 PICKUP 12-14
- SUBURBAN 1500 12-14
- SUBURBAN 2500 12-13
- TAHOE 12-14
- YUKON 12-14
- YUKON XL 1500 12-14
- YUKON XL 2500 12-13
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your VIN is essential. We use it to program the BCM with the correct software and vehicle-specific options, ensuring it works correctly right out of the box.
Is this a difficult part to replace myself?
For a DIYer with some experience, this is a very manageable job. The main challenge is accessing the BCM under the dashboard. Since we handle the programming, the physical swap is straightforward. No special tools are typically required beyond basic hand tools.
What happens if I don’t do the airbag relearn procedure?
If the airbag light comes on after installation and you don’t perform the ‘Setup SDM Primary Key’ procedure, the light will stay on, and more importantly, the airbag system may not function correctly in an emergency. We strongly advise getting this done if the light appears.
Will this fix my ‘Service 4WD’ message?
While a failing BCM can cause a wide range of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), the encoder motor, or a position sensor. It’s best to get a proper diagnosis before replacing the BCM for that specific issue.
Why is this a better option than going to the dealer?
Our solution saves you significant time and money. You avoid towing costs, dealership labor rates, and separate programming fees. We send you a part that’s ready to install, turning a multi-day, expensive repair into a simple swap you can do at home.