If you’re battling bizarre electrical issues in your GM truck or SUV, 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 vehicle into a source of constant frustration. This isn’t just a component; it’s the central command for your vehicle’s body electronics, and when it goes, it can cause a cascade of confusing problems. This replacement BCM, part number 22846364, is the definitive solution for restoring order to your vehicle’s systems.
We take the guesswork and dealership hassle out of the repair. Before this module ships, we program it with the latest GM software updates specifically for your vehicle using the VIN you provide. This means no expensive trips to the dealer for programming. It arrives ready for installation, designed to communicate flawlessly with your truck’s existing components. This is the most direct path to getting your power windows, door locks, interior lights, and other accessories working correctly again.
Common Signs of a Failing GM Body Control Module
A faulty BCM can manifest in many ways, often mimicking other problems. If your truck is showing these symptoms, the BCM is a likely culprit. I’ve diagnosed hundreds of these, and the patterns are often very clear.
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system acting up, causing no-start conditions or random alarm activation.
- ✔ Inconsistent or dead gauges on the instrument cluster.
- ✔ The radio or infotainment system behaving erratically.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0100, U0140, or other ‘U’ codes.
- ✔ The horn honking unexpectedly.
Case Study: A Tricky Diagnosis
A customer brought in his 2013 Silverado 2500 with a laundry list of complaints: the dome light wouldn’t turn off, the driver’s side window worked intermittently, and the radio would randomly shut down. He had already replaced the battery and the window switch with no luck. A quick scan showed a dozen communication codes pointing in different directions. This is a classic BCM failure signature. Instead of chasing individual components, we replaced the BCM. All the phantom electrical gremlins vanished instantly. This single part restored full functionality and saved the customer hundreds in wasted diagnostic time.
Why Choose a Pre-Programmed 2012-2014 Sierra 3500 BCM?
The main advantage is convenience and cost-savings. A new BCM from a dealership is just a blank box; it requires specialized tools like a GM MDI and a subscription to their software service to make it work. That programming session alone can cost a significant amount. Our service bundles the hardware and the essential programming into one package. We ensure it has the correct software for your specific options, saving you time, money, and the headache of coordinating a dealer visit.
Your Step-by-Step BCM Installation Guide
Replacing the BCM is a manageable job for a confident DIYer. It’s typically located under the driver’s side of the dashboard, near the steering column. Always prioritize safety.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Access the Module: Remove any lower dash panels or trim necessary to gain clear access to the BCM. It’s a black box with several large multi-pin connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Reconnect all the electrical connectors firmly, ensuring each one clicks securely into place.
- Reassemble and Reconnect: Reinstall any dash panels you removed. Reconnect the negative battery terminal.
- Perform Relearns: Start the vehicle. You may need to perform a Brake Pedal Position Relearn or an Airbag System Sync as detailed in our FAQ section below. Test all functions like lights, locks, and windows.
Disclaimer: This is a general guide. Specifics can vary. Always consult a factory service manual for your exact model.
Verified Compatibility for Your GM Truck or SUV
This module is a direct replacement for part numbers 22846364, 22737275, and 22846365. It is confirmed to fit a wide range of 2012-2014 General Motors vehicles, including:
- ✔ Cadillac Escalade, ESV, EXT (2012-2014)
- ✔ Chevrolet Avalanche 1500 (2012-2013)
- ✔ Chevrolet Silverado 1500, 2500, 3500 (2012-2014)
- ✔ Chevrolet Suburban 1500, 2500 (2012-2014)
- ✔ Chevrolet Tahoe (2012-2014)
- ✔ GMC Sierra & Sierra Denali 1500, 2500, 3500 (2012-2014)
- ✔ GMC Yukon & Yukon XL 1500, 2500 (2012-2014)
To ensure perfect compatibility, please provide your VIN when placing your order.
Frequently Asked Questions
Do I need to send my old BCM back?
No. This purchase requires no core return. You can keep your original module, which can be helpful if you ever need to reference its part number.
Is this part difficult to install?
For someone with moderate mechanical skill, it’s a straightforward process. The main challenge is accessing the module under the dashboard. No special programming tools are needed since we handle that for you before shipping.
What is the VIN, and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your truck. It allows us to access the exact build sheet and load the correct GM software and calibrations for your vehicle’s specific features, ensuring everything works as it should.
What is the ‘Airbag System Sync’ procedure?
In some cases, after installing the new BCM, the airbag warning light may illuminate. This is because the BCM and the SDM (airbag module) need to be electronically re-synced. A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ function to clear the light.
Do I need to perform a ‘Brake Pedal Position Relearn’?
This may be necessary to ensure your brake lights and traction control system function correctly. It’s a simple procedure that can often be done with a capable bidirectional scan tool to recalibrate the sensor’s home position.