Restore Full Functionality to Your GM Truck or SUV
Is your Sierra, Silverado, or Tahoe plagued by bizarre electrical problems? As a technician with over 20 years of experience, I’ve seen it all: dash lights flickering for no reason, power windows with a mind of their own, and HVAC systems that just quit. More often than not, the culprit is a failing Body Control Module (BCM). This module is the central command for your vehicle’s body electronics. When it fails, it can create a cascade of frustrating and hard-to-diagnose issues. This OEM-quality BCM, part number 15263497, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Case Study: A Tricky Diagnosis
A customer brought in his 2011 Sierra Denali 3500 with a laundry list of complaints: the radio would cut out, the driver’s side power lock was dead, and the airbag light was on with a DTC B1001. He’d already replaced the lock actuator and checked fuses, but the problems persisted. After connecting my scanner, I saw multiple communication errors pointing toward the BCM. We installed one of these VIN-programmed modules, and within minutes, every single issue was resolved. The key was having a module correctly configured for his truck’s options right out of the box, which is exactly what we provide.
Is Your Truck Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement:
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that don’t work, stay on, or flicker.
- ✔ An active airbag warning light, often with diagnostic trouble code B1001.
- ✔ Complete loss of HVAC or blower motor control.
- ✔ Security system malfunctions, causing no-start or stalling conditions.
- ✔ Inconsistent windshield wiper operation.
A Straightforward Guide to Installation
One of the best parts of this solution is the simplicity. You don’t need to be a master mechanic to get your truck back in order. The entire process typically takes less than 10 minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most GM trucks and SUVs from this era, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, the module can be unclipped or unbolted from its bracket.
- Install the New Module: Connect the electrical harnesses to your new, pre-programmed BCM. Ensure they click securely into place. Mount the module back onto its bracket.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
Post-Installation Note: In some cases, particularly if you had an airbag light, a ‘Setup SDM Primary Key in BCM’ procedure may be needed using a professional scan tool to sync the modules. A brake pedal position relearn might also be required on certain models. And remember, there’s no core charge, so you can keep your old part without any hassle.
Guaranteed Fitment for Your GM Vehicle
This BCM is a direct replacement for a wide range of popular GM models and interchanges with numerous part numbers, including 25835966, 15263363, 15878753, 15943678, 20939137, and 22860591. It is engineered to provide a perfect fit for the following vehicles:
- Cadillac Escalade, ESV, EXT (2007-2011)
- Chevrolet Avalanche 1500 (2007-2011)
- Chevrolet Silverado 1500, 2500, 3500 (2007-2013)
- Chevrolet Suburban 1500, 2500 (2007-2011)
- Chevrolet Tahoe (2007-2011)
- GMC Sierra 1500, 2500, 3500 & Denali Models (2007-2013)
- GMC Yukon & Yukon XL 1500/2500 (2007-2011)
If you’re looking for a reliable fix for your 2011 Sierra Denali 3500 BCM or another compatible vehicle, this part offers a dependable, long-term solution without the high cost and inconvenience of a dealership visit.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like your power windows, locks, lights, wipers, security system, and climate controls.
Does this module require programming at the dealership?
No. We pre-program the module to your vehicle’s VIN before shipping. This ensures it works correctly right out of the box, saving you time and money on dealership programming fees.
How difficult is the installation?
Installation is very straightforward for most DIYers. It involves locating the module under the dash, swapping the electrical connectors, and mounting the new unit. It typically takes less than 10 minutes with basic hand tools.
What if my airbag light is still on after installation?
If the airbag light persists, it means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). This requires a ‘Setup SDM Primary Key’ procedure with a bi-directional scan tool, which can be done at any professional repair shop.
Do I need to send my old part back?
No, there is no core charge for this part. You can keep or dispose of your old module without any extra fees or hassle.