Restore Full Electrical Function to Your GM Truck or SUV
Are you chasing down bizarre electrical gremlins in your 2003-2006 Chevrolet Avalanche? One moment the power windows work, the next they don’t. Maybe your HVAC controls have a mind of their own, or the security light is preventing your truck from starting. These are classic signs of a failing Body Control Module (BCM). This OEM-quality BCM, part number 15136877, is the direct-fit, reliable solution to restore full electrical functionality to your vehicle. It arrives expertly programmed to your vehicle’s VIN, eliminating the need for an expensive trip to the dealership.
Expert Pro Tip
Expert Pro Tip
Before you begin swapping the BCM, always disconnect the negative terminal of your vehicle’s battery. This not only prevents accidental shorts but also helps the vehicle’s various computer systems perform a hard reset, which can clear out fault data and allow the new module to integrate more smoothly upon reconnection.
Is Your Avalanche BCM Failing?
- ✔ Intermittent or non-working power windows, door locks, or interior/exterior lights.
- ✔ HVAC and climate control systems behaving erratically or not working at all.
- ✔ An active airbag warning light on the dash, often accompanied by diagnostic trouble code B1001.
- ✔ Vehicle security system issues, including random alarm activation or a no-start condition where the engine cranks but won’t turn over.
- ✔ Unexplained battery drain or strange grounding issues that are difficult to diagnose.
- ✔ A variety of communication-related DTCs stored in the vehicle’s computer system.
Key Features of this 2003-2006 Avalanche Body Control Module
The BCM is the central nervous system for your truck’s body electronics, managing a wide array of components you interact with every day. When it begins to fail, it can cause a cascade of confusing and frustrating issues. Our replacement module solves this by providing a stable, dependable component that’s built to meet or exceed original equipment standards. By ordering a pre-programmed module, you are getting a part that is flashed with your truck’s specific Vehicle Identification Number (VIN) and the latest GM software. This ensures that all the original options and security features of your vehicle work correctly right out of the box, making this the most efficient solution for both DIY mechanics and professional technicians. This part is a direct replacement for multiple part numbers, including 15116066, 15136225, 15198116, and more.
Installation and Post-Install Considerations
Installation is typically a quick process. The BCM is located under the driver’s side dashboard, near the steering column. After swapping the part and reconnecting the battery, most functions should be immediately restored. However, in some cases, additional steps may be needed. If the airbag light remains on, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. Similarly, a brake pedal position sensor relearn might be necessary on certain models to ensure proper brake light operation. Always consult a factory service manual for detailed instructions specific to your vehicle.
Frequently Asked Questions
Expert Pro Tip
Before you begin swapping the BCM, always disconnect the negative terminal of your vehicle’s battery. This not only prevents accidental shorts but also helps the vehicle’s various computer systems perform a hard reset, which can clear out fault data and allow the new module to integrate more smoothly upon reconnection.