Restore Your Truck’s Brain, Restore Your Peace of Mind
Your 2011 GMC Sierra Denali 3500 is a testament to capability and reliability, but when its Body Control Module (BCM) begins to fail, it can bring your workhorse to a standstill with a host of frustrating electrical problems. This genuine GM-quality Body Control Module, part number 25844480, is the definitive solution. We pre-program it to your truck’s specific VIN, eliminating the need for expensive dealership visits and ensuring a true plug-and-play installation. Get back to depending on your truck, not worrying about it.
Common Symptoms & Your Solution
A faulty BCM can manifest in numerous ways, turning your dependable truck into a source of constant annoyance. If you’re experiencing any of the following, this module is the solution you need:
- Unresponsive or erratic HVAC and climate controls.
- Power windows, door locks, or exterior/interior lights that don’t work correctly.
- An airbag warning light that won’t turn off, often with DTC B1001 stored.
- Strange security system behavior, intermittent stalling, or misfires.
- A dashboard lit up with various body-related Diagnostic Trouble Codes (DTCs).
This pre-programmed module is engineered to resolve these issues at their source, restoring the seamless integration of your truck’s electronic systems. It’s the most effective way to fix a problematic 2011 GMC Sierra 3500 BCM and get your vehicle operating as it should.
Features & Benefits
- ✔ Plug & Play Installation: We program the module to your vehicle’s VIN before shipping. This means no additional programming is required—simply install it and restore full functionality in minutes.
- ✔ Eliminate Electrical Gremlins: Regain full control over essential functions like lights, locks, windows, wipers, and climate systems for a safer and more comfortable drive.
- ✔ Resolve Stubborn DTCs: This module is programmed with the latest GM software updates to clear common fault codes and prevent them from returning.
- ✔ OEM-Standard Quality: Built to meet or exceed original equipment specifications, ensuring a perfect fit and long-term durability for your hard-working truck.
- ✔ Guaranteed Compatibility: This is a direct replacement for a wide range of part numbers, including 15943678, 25835966, 20939137, and more, ensuring a perfect match for your vehicle.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Pro-Tip From Our Master Tech
“Before you install your new 2011 GMC Sierra 3500 BCM, take a moment to inspect the main ground connections under the dash and on the A-pillar. A poor ground is a leading cause of BCM failure and can damage a new unit. Cleaning the contact points with a wire brush to ensure a solid metal-to-metal connection is a 5-minute step that can save you from future headaches. A solid ground is the foundation of a healthy electrical system.”
Frequently Asked Questions
What exactly does the Body Control Module do on my Sierra?
The BCM acts as the central computer for your truck’s body electronics. It manages non-engine related functions like your interior and exterior lights, power windows and locks, security system, wipers, and HVAC blower motor controls. When it fails, these systems can become erratic or stop working altogether.
Is this module truly ‘plug-and-play’?
Yes. By programming the module to your vehicle’s VIN before it ships, we handle the critical step that would otherwise require a trip to a dealership. For the vast majority of installations, you simply disconnect the old module and connect the new one. The only exception is detailed in the next question.
What if my airbag light is on after installation?
If you have an airbag light on with a DTC like B1001, you may need to perform an ‘SDM Key Update’ or ‘Setup SDM Primary Key in BCM’ procedure. This requires a professional-grade scan tool and syncs the new BCM with the airbag system. This is a simple procedure for any qualified technician.
Do I need to send my old part back?
No. We do not require a core return for this part. You can keep or dispose of your old module, saving you the time and hassle of shipping it back.
How can I be sure this is the right 2011 GMC Sierra 3500 BCM for my truck?
This module replaces a wide range of original part numbers. The best way to confirm fitment is to match your original part number to the extensive list in our description or use our website’s vehicle fitment tool. If you’re still unsure, our expert support team is here to help.