Are you battling frustrating electrical problems in your 2007-2012 GMC Acadia? Flickering lights, malfunctioning power windows, or a dashboard that has a mind of its own are common signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s electronic accessories, and when it fails, it can cause a wide range of confusing and intermittent issues. This replacement Body Control Module, part number 20921435, is the definitive solution to restore your vehicle’s functionality and peace of mind.
We make the repair process simple. Unlike going to a dealership, this module comes pre-programmed with the latest GM software specifically for your vehicle. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) after purchase, and our experts will flash the module before it ships. This means no expensive trips to the dealer for programming—it’s ready for installation right out of the box.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-working power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system light is illuminated, preventing the vehicle from starting.
- ✔ Radio, climate control, or instrument cluster display behaving unpredictably.
- ✔ False warnings appearing on the driver information center.
- ✔ Inconsistent operation of turn signals or hazard lights.
Why Choose Our Pre-Programmed Acadia Body Control Module?
This isn’t just a replacement part; it’s a complete, hassle-free solution. By programming the module to your VIN, we ensure it communicates perfectly with your vehicle’s other electronic systems, like the Engine Control Module (ECM) and Transmission Control Module (TCM). This module is a direct replacement for a wide range of original part numbers, including: 10382479, 15093910, 15276271, 15299986, 15819552, 20921435, 22860591, and many more, offering broad compatibility across numerous GM models such as the Chevrolet Traverse, Buick Enclave, and Saturn Outlook.
Post-Installation Procedures
After installing your new BCM, some vehicles may require one or two simple relearn procedures to ensure all systems are synchronized. These can often be performed with a high-end diagnostic scan tool.
- Airbag System Sync: If the airbag warning light is on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ is needed. This syncs the BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: To ensure correct brake light and traction control operation, a brake pedal position sensor recalibration might be necessary.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We handle the programming for you before we ship the part. Just provide your vehicle’s VIN during or after checkout, and it will arrive ready to install.
What is a Body Control Module (BCM)?
The BCM is a computer in your vehicle that controls and monitors many of its non-engine-related functions. This includes power windows, locks, lights, wipers, the security system, and the instrument panel.
Will this fix the ‘Service Airbag’ light on my dash?
A faulty BCM can cause a ‘Service Airbag’ light. After installing this new module, the light may stay on until an ‘SDM Primary Key Setup’ is performed with a professional scan tool to sync the BCM with the airbag system.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.
How do I know if this part will fit my vehicle?
This module fits a wide range of GM vehicles, including the 2007-2012 Acadia, Traverse, Enclave, and many others. Please check the extensive list of compatible models and part numbers on this page or contact us with your VIN to confirm fitment.
Where is the BCM located on my 2008 GMC Acadia?
On the 2007-2012 GMC Acadia, the Body Control Module is typically located on the left-hand (driver’s side) of the dashboard, often behind the lower dash panel near the steering column.