Restore Full Electrical Function to Your GM Truck or SUV
Are you battling a frustrating array of electrical problems in your vehicle? Intermittent power windows, a malfunctioning HVAC system, flickering lights, or a persistent airbag warning can all point to a single culprit: a failing Body Control Module (BCM). This genuine GM BCM, part number 25971917, is the central nervous system for your vehicle’s body electronics. We offer this module pre-programmed to your vehicle’s specific VIN, ensuring a seamless, plug-and-play installation that restores functionality without requiring a trip to the dealership for expensive programming. This is the definitive solution for your 2011 Sierra Denali BCM and a wide range of other 2007-2013 GM trucks and SUVs.
From the Diagnostic Bay
We recently had a 2012 Silverado in the shop with a classic case of BCM failure. The owner was frustrated with his radio turning on and off by itself, the driver’s side power lock not working, and the A/C blower motor being completely unresponsive. After confirming power and ground to the affected components were good, we diagnosed the BCM. Instead of a costly dealer replacement, we installed one of our VIN-programmed modules. The installation took less than 10 minutes, and the moment the battery was reconnected, every single issue was resolved. The customer was thrilled to have his truck back to normal without the typical hassle and expense.
Symptoms of a Failing BCM and Key Benefits
- ✔ Erratic Electronics: Fixes non-working power windows, door locks, interior/exterior lights, and windshield wipers.
- ✔ HVAC Control Issues: Restores proper operation to your climate control and blower motor.
- ✔ Security System Malfunctions: Solves problems with the anti-theft system that can cause no-start conditions or false alarms.
- ✔ Warning Lights: Can resolve persistent airbag lights, particularly those associated with DTC B1001 (SDM communication failure).
- ✔ Plug-and-Play Installation: Arrives pre-programmed to your vehicle’s VIN. No additional dealer programming is needed.
- ✔ OEM Quality & Reliability: Built to strict General Motors standards for long-lasting performance and durability.
- ✔ No Core Charge: Keep your old part, saving you time and the hassle of a core return.
Installation Details for Your 2011 Sierra Denali BCM
Replacing the BCM is a straightforward process. The module is typically located under the driver’s side dashboard, near the steering column. After disconnecting the vehicle’s battery, you can unclip the electrical connectors, remove the old module, and install the new one. While the VIN programming handles the primary setup, some vehicles may require a post-installation procedure. If the airbag warning light remains on, a technician will need to perform an ‘SDM Key Update’ or ‘Setup SDM Primary Key in BCM’ function with a capable scan tool. This syncs the new BCM with the airbag system. In some cases, a Brake Pedal Position Relearn may also be necessary. Always consult a service manual for procedures specific to your vehicle.
This module is a direct replacement for a variety of part numbers, including: 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 15901388, 20939137, 20939138, and 22860591.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions, such as power windows, door locks, lighting, wipers, the security system, and the HVAC system.
Why is VIN programming so important for this part?
VIN programming loads your vehicle’s specific software and configurations onto the BCM. Without it, the module will not communicate correctly with other computers in your vehicle, leading to improper function or a no-start condition. Our pre-programming saves you a mandatory, costly trip to the dealership.
Is this BCM difficult to install?
The physical installation is simple for most DIY mechanics and typically takes only a few minutes. It involves unplugging the old module and plugging in the new one. However, be aware that a post-install procedure with a professional scan tool might be needed to clear certain warning lights, like the airbag light.
Will this fix my airbag light with a B1001 code?
A faulty BCM is a common cause of the B1001 diagnostic trouble code. Replacing it with this programmed module should resolve the root cause. However, you will still need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a scan tool to clear the light after installation.
How do I know if this is the correct part for my truck?
This module fits a wide range of 2007-2013 GM vehicles like the Sierra, Silverado, Tahoe, and Escalade. The best way to confirm is to match your original part number to one of the numbers listed in our description. If you’re unsure, please contact us with your VIN.