Restore Full Control Over Your Truck’s Electronics
Is your 2011 GMC Sierra Denali 1500 suffering from bizarre electrical problems? Flickering lights, a dead A/C blower, or power windows with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating issues. This direct-replacement BCM, part number 15940214, arrives expertly programmed to your vehicle’s specific VIN, eliminating the need for an expensive trip to the dealership. It’s the definitive solution to get your truck’s comfort, convenience, and safety features working like new again.
Case Study: A Tricky Diagnosis
I recently had a 2011 Sierra in the bay with a laundry list of complaints: the radio would cut out, the dome light wouldn’t turn off, and the driver’s side power lock was dead. The owner had already replaced fuses and checked wiring. After hooking up the scanner, I saw a handful of communication codes but no smoking gun. From years of experience with these GM platforms, I knew to look at the BCM data stream. Sure enough, input signals were being received, but the module wasn’t sending the right commands out. A failing BCM was shorting internally, creating these ghost-like problems. Swapping in a VIN-programmed module like this one solved every single issue in under 10 minutes. It’s often the root cause of the most perplexing electrical faults.
Is Your Truck Exhibiting These Electrical Faults?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit. This is especially true if you see diagnostic trouble code (DTC) B1001.
- ✔ The A/C and heater controls work intermittently or not at all.
- ✔ Your airbag warning light is illuminated on the dash.
- ✔ Power windows, door locks, or mirrors have stopped responding.
- ✔ The security system acts erratically, sometimes preventing the truck from starting.
- ✔ Headlights, taillights, or interior lights flicker or fail to operate correctly.
- ✔ The engine stalls unexpectedly or misfires due to communication loss.
Your Straightforward 5-Minute Installation Guide
Getting your truck back to normal is easier than you think. For most DIYers and professional mechanics, this is a quick and simple job.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most 2007-2013 GM trucks and SUVs, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. Release the mounting tabs and remove the old unit. Snap the new, pre-programmed module into place and securely reconnect all connectors.
- Reconnect & Test: Reconnect the negative battery terminal. Start your vehicle and test all functions—lights, windows, locks, and HVAC—to confirm the repair was successful.
- Post-Install Check: In some cases, the airbag light may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the systems. This is a simple procedure for any modern repair shop.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for a wide range of General Motors vehicles, ensuring a perfect fit and function. It is interchangeable with part numbers 25844480, 25835966, 15926094, 20939137, and others listed in the original part data. Please verify your model and year below.
- Cadillac: Escalade, Escalade ESV, Escalade EXT (2007-2011)
- Chevrolet: Avalanche 1500 (2007-2011), Silverado 1500/2500/3500 (2007-2013), Suburban 1500/2500 (2007-2011), Tahoe (2007-2011)
- GMC: Sierra 1500/2500/3500 (2007-2013), Sierra Denali (2007-2013), Yukon & Yukon XL (2007-2011)
Note: For 2007 models, this fits the ‘new style’ with the smooth door skin. For some 2010 and 2013 models, please confirm the ID on your original part matches 25835966.
Frequently Asked Questions
Will I need a dealership to program this 2011 Sierra 1500 BCM?
Absolutely not. We program the module to your vehicle’s VIN before shipping. It arrives ready for a plug-and-play installation, saving you time and money.
What if my airbag light stays on after installation?
This is a known GM security procedure. If the light persists, a technician will need to use a professional scan tool to perform a quick ‘Setup SDM Primary Key in BCM’ function. This syncs the new BCM with the airbag system.
Do I have to send my old part back? What is a core charge?
There is no core charge for this part. A core charge is a deposit you pay until you return your old part. With us, you can simply keep or dispose of your old module, making the process hassle-free.
My mechanic mentioned a ‘Brake Pedal Position Relearn’. Is that needed?
Depending on your specific model, a brake pedal position sensor recalibration may be necessary to ensure proper brake light and traction control operation. This is a standard procedure that can be done with a capable scan tool.
Is this part number 15940214 the same as 25844480?
Yes. GM uses several part numbers for the same component across different model years. Part number 15940214 is fully interchangeable with 25844480 and others, and this module is the correct replacement for all of them.