Is Your GM Truck Plagued by Electrical Gremlins?
If you’re dealing with baffling electrical issues in your GMC Sierra, Chevrolet Silverado, or other GM truck/SUV, a failing Body Control Module (BCM) is often the culprit. This critical component acts as the central nervous system for your vehicle’s body electronics. When it malfunctions, you can experience a frustrating array of problems, from flickering lights and unresponsive power windows to a dead HVAC system or even no-start conditions. This replacement Body Control Module, equivalent to GM part number 25844480 and interchangeable with 15901388, is the definitive solution to restore your vehicle’s full functionality.
Symptoms of a Failing Body Control Module
- ✔ Unresponsive or erratic power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that won’t turn on or off, or flicker randomly.
- ✔ HVAC and climate control systems that are inoperative or have a mind of their own.
- ✔ An illuminated airbag warning light, often with diagnostic trouble code (DTC) B1001.
- ✔ Malfunctioning security system, leading to false alarms or starting issues.
- ✔ Intermittent windshield wiper operation.
- ✔ Strange electrical behavior that seems to have no clear cause.
The Plug-and-Play Solution for Your 2011 Sierra Denali BCM
Don’t let a faulty module keep your truck off the road. This BCM is the ideal fix, arriving at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless integration with your truck’s existing systems, eliminating the need for expensive dealership programming. It’s built to meet or exceed original equipment standards, providing a reliable and lasting repair. By controlling the communication between your vehicle’s various electronic systems, this module restores the dependable performance you expect from your truck.
Installation is straightforward for any DIY mechanic. The BCM is typically located under the driver’s side dashboard near the steering column. Once installed, most functions will be immediately restored. In some cases, particularly if you have an airbag light, a simple post-installation procedure like an ‘SDM Key Sync’ or ‘Brake Pedal Position Relearn’ may be required using a capable diagnostic scan tool. This ensures all safety systems are correctly synchronized with the new module.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We pre-program the module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money.
Where is the BCM located on my 2011 Sierra Denali?
The Body Control Module is typically found under the driver’s side dashboard, near the steering column. It’s usually accessible by removing the lower dash panel.
My airbag light is on. Will this fix it?
A faulty BCM is a common cause of an airbag light with code B1001. Replacing it should resolve the issue, but you may need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool to sync the systems and turn off the light.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module without any extra fees.
My original part number is different from 15901388. Will this still work?
Yes, this module is a direct replacement for a wide range of part numbers, including 25844480, 25835966, 20939137, and many others. It is designed to be fully compatible with the vehicles listed in the fitment guide.