Are you battling persistent and unpredictable electrical problems in your GMC Sierra Denali? A faulty Body Control Module (BCM) is often the culprit behind issues like malfunctioning power windows, erratic interior lights, non-responsive door locks, and confusing dashboard warning lights. The BCM acts as the central nervous system for your truck’s body electronics, and when it fails, it can make driving a frustrating experience. This genuine OEM-quality replacement, part number 15943678 (interchangeable with 25844480 and others), is the definitive solution to restore your vehicle’s full functionality.
Is Your Sierra Denali Showing These BCM Failure Symptoms?
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or refusing to turn on.
- ✔ HVAC and climate control systems behaving erratically or the blower motor failing to operate.
- ✔ The security system engaging randomly, causing no-start conditions or stalling.
- ✔ An airbag warning light illuminated on the dash, often with a DTC B1001 code.
- ✔ Multiple, seemingly unrelated diagnostic trouble codes (DTCs) stored in the system.
Plug-and-Play Solution for Your 2007-2010 Sierra Denali BCM
Forget about expensive dealership visits and additional programming fees. We simplify the repair process by pre-programming this module to your truck’s specific Vehicle Identification Number (VIN) before shipping. This ensures that it integrates seamlessly with your vehicle’s existing systems right out of the box. The module arrives with the latest GM software updates, providing optimal performance and reliability. Installation is straightforward, typically taking less than 15 minutes with basic tools, as the BCM is conveniently located under the steering column.
Frequently Asked Questions
What exactly does the Body Control Module do on my truck?
The BCM is a computer that manages and controls a wide range of your truck’s non-engine related electronic functions. This includes the power windows, door locks, security system, interior and exterior lighting, wipers, and the HVAC system.
Is this part ready to install when I receive it?
Yes. We pre-program the module to your vehicle’s VIN before it ships. This makes it a true plug-and-play installation, with no need for additional programming at a dealership.
What if the airbag light stays on after I install the new BCM?
In some cases, the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed with a professional-grade diagnostic scan tool.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your old module without any extra fees or hassle.
Will this BCM fit other GM trucks and SUVs?
Yes, this module is compatible with a wide range of 2007-2013 GM vehicles, including the Chevrolet Silverado, Tahoe, Suburban, and Avalanche, as well as the GMC Yukon and Cadillac Escalade. Please verify your part number or use our fitment tool to confirm compatibility.