Restore Full Electrical Function to Your GM Truck or SUV
Are you battling strange and frustrating electrical issues in your GMC Sierra, Chevrolet Silverado, or other GM vehicle? Intermittent wipers, flickering lights, non-responsive power windows, or a malfunctioning security system are common signs of a failing Body Control Module (BCM). This vital component acts as the central hub for your vehicle’s body electronics. When it fails, it can cause a cascade of problems that are difficult to diagnose. This genuine GM Body Control Module, part number 25835966 (interchangeable with 25844480 and others), is the definitive solution for your 2013 Sierra 3500 BCM and a wide range of other 2007-2013 GM models.
Symptoms of a Failing Body Control Module
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the culprit:
- ✔ Unresponsive or erratic power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off, or flicker randomly.
- ✔ HVAC system failures, such as a blower motor that won’t work or climate controls that are inoperative.
- ✔ Security system malfunctions, including false alarms or no-start conditions.
- ✔ An airbag warning light on the dash, often accompanied by DTC B1001.
- ✔ Wipers that activate on their own or fail to respond to the switch.
- ✔ A host of communication-related Diagnostic Trouble Codes (DTCs).
The Plug-and-Play Solution: A Pre-Programmed 2013 Sierra 3500 BCM
Don’t waste time and money at the dealership. We simplify the repair process by pre-programming this module to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures that the BCM communicates flawlessly with your truck’s other electronic systems right out of the box. All the latest software updates from GM are applied, guaranteeing optimal performance and reliability. This is a true plug-and-play solution that eliminates the need for expensive dealer tools or additional programming fees.
Installation and Post-Install Notes
Installation is straightforward for most DIY mechanics. The BCM is typically located under the driver’s side dashboard, near the steering column. The physical swap takes only a few minutes. However, be aware of two potential post-installation procedures:
- Airbag System Sync: If the airbag warning light remains on after installation, a procedure called “Setup SDM Primary Key in BCM” must be performed. This requires a professional-grade scan tool and syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light operation. This is also done with a capable scan tool.
This module requires no core charge, so you can keep your old part without the hassle of returning it.
Frequently Asked Questions
What does “VIN Programmed” mean?
It means we load your vehicle’s specific VIN and corresponding software onto the BCM before shipping it to you. This makes the module ready for installation without needing a trip to the dealership for expensive programming, ensuring it works correctly with your truck’s specific options.
Is this a difficult part to install myself?
The physical installation is very simple, usually taking less than 15 minutes with basic tools. It’s located under the steering column. However, be prepared for potential electronic relearn procedures (like for the airbag system) which may require a professional scan tool.
Will this BCM fix my airbag light with code B1001?
A faulty BCM is a very common cause of the B1001 code. Replacing it with this programmed module should resolve the root cause. However, after installation, you will likely need to perform the “Setup SDM Primary Key in BCM” procedure with a scan tool to clear the light.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module without any additional fees or hassle.
How do I know if this part number is correct for my vehicle?
This module, 25835966, is a direct replacement for a wide range of GM part numbers including 25844480, 15943678, 20939137, and 22860591. Please check the fitment list on this page or contact us with your VIN to confirm compatibility.