Restore Full Electrical Function to Your GM Truck or SUV
Are you battling bizarre electrical issues in your GMC Sierra, Chevy Silverado, or Tahoe? Flickering lights, unresponsive power windows, a malfunctioning security system, or an HVAC system with a mind of its own are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This OEM-quality replacement BCM, part number 15926094, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a true plug-and-play repair.
Common Symptoms of a Failing BCM
- ✔ Unresponsive or erratic power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ HVAC and climate control systems not working or blowing air from the wrong vents.
- ✔ An active security system light, preventing the vehicle from starting.
- ✔ An illuminated airbag warning light, often with a DTC B1001 code.
- ✔ Intermittent windshield wiper operation.
- ✔ A host of communication-related Diagnostic Trouble Codes (DTCs).
Diagnosing and Replacing Your 2007-2010 Sierra Denali BCM
Replacing the BCM is a straightforward job for a DIY mechanic or professional technician. The module is typically located under the driver’s side dashboard, near the steering column. Installation involves disconnecting the negative battery terminal, unplugging the electrical connectors from the old module, removing it, and installing the new one in its place. Because this module comes programmed to your VIN, no further dealership intervention is typically required. However, please note the following post-installation procedures:
- Airbag System Sync: If the airbag warning light remains on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed. This requires a professional-grade scan tool and syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure correct brake light operation and traction control function.
This module is a direct replacement for a wide range of GM part numbers, including 25844480, 25835966, 15878753, 20939137, and 22860591. By providing your VIN at checkout, you ensure you receive a part that is perfectly matched to your vehicle’s factory settings, restoring its performance and reliability without the hassle.
Frequently Asked Questions
Why is providing my VIN so important?
Your vehicle’s VIN allows us to program the BCM with the exact software and settings for your specific model, year, and options. This makes the installation plug-and-play and avoids a costly trip to the dealership for programming.
Can I install this BCM myself?
Yes, the physical installation is simple and usually takes less than 30 minutes. However, be aware that post-installation procedures, like an airbag system sync, may require a professional scan tool if warning lights appear.
Will this fix my airbag warning light?
A faulty BCM is a common cause of an airbag light. Replacing it will often solve the issue. If the light stays on after installation, the ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible scan tool to clear the code.
What happens if I don’t replace a bad BCM?
Ignoring a failing BCM can lead to worsening electrical problems, compromise the function of safety systems like airbags, and could eventually result in a no-start condition, leaving you stranded.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without any need to send it back, making the process hassle-free.
Does this part fit vehicles other than the Sierra Denali?
Absolutely. This BCM is compatible with a wide range of 2007-2013 GM vehicles, including the Chevrolet Silverado, Suburban, Tahoe, Avalanche, and the Cadillac Escalade.