Restore Full Electrical Function to Your GM Truck or SUV
Are you battling persistent electrical gremlins in your GMC Yukon, Chevy Silverado, or Cadillac Escalade? Flickering lights, unresponsive power windows, a malfunctioning security system, or a dead HVAC system are common 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 wide range of frustrating and difficult-to-diagnose issues. This OEM-quality replacement module, part number 20939137 (interchangeable with 25844480 and others), is the definitive solution to restore your vehicle’s performance and reliability.
Is Your GM Truck or SUV Showing These Symptoms?
- ✔ Unresponsive or intermittent HVAC controls and blower fan operation.
- ✔ The airbag warning light is illuminated, often with a DTC B1001 code.
- ✔ Power windows, door locks, or interior/exterior lights work sporadically or not at all.
- ✔ The security system acts up, causing no-start conditions, stalling, or misfires.
- ✔ Multiple, seemingly unrelated diagnostic trouble codes (DTCs) are present.
- ✔ Problems with windshield wipers or other accessory functions.
The Plug-and-Play Solution: A Programmed Yukon Body Control Module
Replacing a BCM traditionally required a trip to the dealership for expensive programming. Our process eliminates that step. We pre-program this Yukon Body Control Module to your vehicle’s specific VIN before shipping. This ensures that it integrates seamlessly with your vehicle’s existing systems right out of the box. It arrives ready for a simple, plug-and-play installation, loaded with the latest GM software updates to ensure optimal performance and resolve common electronic faults without any additional setup.
Simple Installation and Post-Install Notes
Installation is straightforward for any DIYer with basic tools. The BCM is typically located under the driver’s side dashboard, near the steering column. The physical swap takes only a few minutes. However, please be aware of the following potential post-installation procedures:
- Airbag System Sync: If the airbag warning light remains on after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light and traction control functionality.
This module is a direct replacement for a wide range of part numbers, including: 25835966, 15263363, 15943678, 25790508, 25844479, 20939137, 20939138, and 22860591. Please verify your part number to ensure compatibility.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the main computer for your vehicle’s comfort and convenience features. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and the HVAC system.
Is this BCM already programmed?
Yes! We program the module to your vehicle’s VIN before it ships. This makes installation a simple plug-and-play process, with no need for a visit to the dealership for programming.
Where is the BCM located on a 2008 GMC Yukon?
On most 2007-2013 GM trucks and SUVs, including the GMC Yukon, the BCM is located under the driver’s side dashboard, to the left of the steering column.
Will this fix my airbag light with code B1001?
A faulty BCM is a common cause of the B1001 code. Replacing it often resolves the issue, but you may need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light after installation.
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.
What vehicles is this part compatible with?
This BCM fits a wide range of 2007-2013 GM vehicles, including the Chevrolet Avalanche, Silverado, Suburban, Tahoe; GMC Sierra, Yukon, Yukon XL; and Cadillac Escalade. Please check the full fitment list on the product page.