Is your GMC Savana or other GM vehicle plagued by strange electrical gremlins? Issues like malfunctioning power windows, erratic interior lights, or a security system that won’t cooperate are often symptoms of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating problems. This replacement Body Control Module, part number 15921353, is the reliable solution to restore full functionality to your vehicle.
We take the guesswork out of the repair by pre-programming this module to your vehicle’s specific VIN. This ensures compatibility and proper operation of all features your vehicle was built with. Simply provide us with your VIN after purchase, and we’ll flash the unit with the latest software from GM before it ships. This service eliminates the need for expensive dealership programming, saving you time and money.
Common Symptoms of a Failing BCM:
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights staying on, flickering, or not turning on.
- ✔ The security system or keyless entry malfunctioning.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Instrument cluster gauges behaving erratically or displaying incorrect information.
- ✔ The vehicle not starting due to a security system fault (anti-theft light on).
From the Diagnostic Bay
We once had a 2011 Express van come in with the complaint that the battery was dying overnight. The customer had already replaced the battery and alternator, but the problem persisted. A parasitic draw test pointed to a significant drain. After isolating circuits, we traced it back to the BCM, which wasn’t letting the interior lighting circuit go to ‘sleep’ after the van was shut off. Replacing the BCM with a correctly programmed unit solved the phantom drain, saving the customer from further unnecessary parts replacements.
Why Choose Our Savana 3500 Body Control Module?
This isn’t just a replacement part; it’s a complete solution. By programming the module to your VIN, we ensure it communicates correctly with all other computers in your vehicle, like the Engine Control Module (ECM) and Transmission Control Module (TCM). This is a critical step that is often overlooked. Our process provides a dependable part that is ready for installation, getting your work van or family vehicle back on the road with minimal downtime. This module is a direct replacement for a wide array of GM part numbers, ensuring broad compatibility across many models like the Express, Acadia, Tahoe, and Impala.
Installation and Post-Install Notes
While installation is straightforward for many, some vehicles may require additional steps after the new BCM is installed. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light illuminates after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information, as the programming is essential for the part to function correctly.
Is this part truly plug-and-play?
For most vehicles, yes. Because we pre-program it to your VIN, it eliminates the need for dealership programming. However, as noted, some models may require minor relearn procedures (like for the brake pedal sensor or airbag system) with a capable scan tool.
What happens if my airbag light is on after installation?
This indicates the new BCM needs to be synchronized with the vehicle’s Sensing and Diagnostic Module (SDM). A qualified technician with a professional diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
How do I know if my BCM is the problem?
The best way to be certain is through professional diagnosis. However, if you are experiencing multiple, unrelated electrical issues from the symptoms list, the BCM is a very likely culprit.
This BCM fits many vehicles. How do I know it’s right for mine?
Match the part number from your original BCM to the extensive list of compatible numbers in our description. Providing your VIN for programming is the final step that guarantees it will work with your vehicle’s specific options.