Restore Your Truck’s Electrical Systems Fast
Are you dealing with bizarre electrical issues in your GMC Sierra or other GM truck? One minute the radio works, the next it doesn’t. Your power windows have a mind of their own, and a persistent airbag light is staring you down. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM), the central hub for your vehicle’s body electronics. This replacement module, equivalent to GM part 15263497, is the definitive solution. It arrives pre-programmed to your truck’s specific VIN, eliminating the need for expensive dealership visits and getting you back on the road with confidence.
As the command center for features like lighting, power locks, HVAC controls, and the security system, a healthy BCM is critical for both convenience and safety. A faulty one can cause a cascade of frustrating problems. Our VIN-programmed module ensures that once installed, it communicates seamlessly with all other systems in your truck, just like the original part. This is the most reliable and straightforward way to fix these issues for good.
Is Your Sierra Experiencing These Electrical Glitches?
- ✔ An active airbag warning light on the dash, often with a DTC B1001 stored in the system.
- ✔ Intermittent or completely non-functional power windows, door locks, or interior/exterior lights.
- ✔ The HVAC blower motor or climate controls work sporadically or not at all.
- ✔ The anti-theft or security system acts up, sometimes preventing the truck from starting.
- ✔ Unexplained battery drain or strange grounding-related symptoms that are hard to trace.
- ✔ A variety of communication or body-related Diagnostic Trouble Codes (DTCs).
A Technician’s Notebook
I had a 2009 Sierra 1500 in the bay last month that was driving the owner crazy. The dashboard lights would flicker, the horn would honk randomly when locking the doors, and he had a stubborn airbag light with code B1001. He’d already replaced the battery and checked the main grounds. After scanning the network, I saw communication dropouts from the BCM. These GMT900 platform trucks are notorious for BCM failure due to internal circuit board issues. We installed one of our VIN-programmed modules. The swap took less than 10 minutes. Afterward, we performed the ‘Setup SDM Primary Key’ function with our scan tool to sync it with the airbag module, and the B1001 code cleared permanently. All the other phantom electrical issues were gone instantly. It’s a textbook fix I’ve done hundreds of times.
Your 5-Minute Path to a Fully Functional Truck
Installation is a simple DIY job that requires basic tools and can be completed in minutes. The BCM is located under the driver-side dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the Module: Find the BCM under the dash. It’s a plastic box with several large multi-pin electrical connectors.
- Swap the Connectors: Carefully release the locking tabs on each electrical connector and unplug them from the old BCM. Plug them securely into your new, pre-programmed module. The connectors are keyed and will only fit in their correct positions.
- Mount the New BCM: Secure the new module in the factory mounting location.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, wipers, locks, windows, and HVAC to confirm the repair.
- Post-Install Checks: In some cases, an airbag light may persist. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ or a similar function. A Brake Pedal Position Relearn may also be needed on certain models.
Verified Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part number 15263497 and is interchangeable with a wide range of other part numbers, including 25835966, 25844480, 20939137, and more. It is confirmed to fit the following vehicles:
- Chevrolet Avalanche: 2007-2011
- Chevrolet Silverado 1500/2500/3500: 2007-2011
- Chevrolet Suburban 1500/2500: 2007-2011
- Chevrolet Tahoe: 2007-2011
- GMC Sierra 1500/2500/3500: 2007-2011
- GMC Yukon & Yukon XL: 2007-2011
- Cadillac Escalade, ESV, EXT: 2007-2011
Note: For 2007 models, this fits the ‘New Body Style’ (smooth door skin). Always verify your part number for a perfect match. A proper diagnosis is key before ordering a 2007-2011 Sierra 1500 BCM.
Frequently Asked Questions
Why is VIN programming so important?
VIN programming loads your truck’s specific software and configurations onto the BCM. Without it, the module won’t know what options your vehicle has (like power seats, specific lighting, etc.) and won’t function correctly, leading to persistent errors or non-working features. Our service saves you a trip to the dealer.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle.
Will this fix my airbag light?
This module will often resolve BCM-related airbag codes like B1001. However, after installation, you may need a professional scan tool to perform a ‘Setup SDM Primary Key’ relearn procedure to sync the new BCM with the airbag system and turn off the light.
Is this a difficult part to install myself?
Not at all. For most DIYers with basic tools, this is a very straightforward job that typically takes under 15 minutes. The main challenge is accessing the module under the dashboard.
What if I still have problems after installation?
First, double-check all connector seatings. Second, remember that some systems require a relearn procedure as mentioned. If issues persist, it’s wise to check for underlying vehicle problems like poor ground connections or wiring faults, which can mimic or cause BCM failure.