Restore Your Vehicle’s Electrical System with Confidence
Are you battling bizarre and frustrating electrical problems? Flickering lights, malfunctioning power windows and locks, a security system that acts on its own, or an engine that refuses to start can all point to a single culprit: a failing Body Control Module (BCM). This critical component is the central nervous system for your vehicle’s electronics, and when it fails, it can cause chaos. Stop chasing symptoms and replace the core of the problem with this professionally prepared, VIN-specific Programmed 20921435 Body Control Module, designed to restore your vehicle to perfect working order.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing BCM is the likely cause:
- Interior or exterior lights staying on or not working at all
- Power windows, door locks, or mirrors operating erratically
- The security system engaging randomly or preventing the car from starting
- Warning lights appearing on the dashboard with no apparent cause
- Intermittent starting problems or a complete no-start condition
- Problems with the radio, climate control, or other interior accessories
This module is the definitive solution. We take a genuine OEM-spec unit and flash it with the latest, most stable software from GM, precisely matched to your vehicle’s unique Vehicle Identification Number (VIN). This ensures seamless communication between all your vehicle’s systems, just as the factory intended.
Expert Insight: The ‘Plug & Play’ Advantage
Why is VIN programming so important? A BCM isn’t a simple part you can just swap out. It contains vehicle-specific information about your security system, key fobs, and optional features. Installing a non-programmed module from a junkyard or another vehicle simply won’t work and will likely leave your vehicle immobilized. Our service eliminates the need for an expensive trip to the dealership for programming. We handle the complex part, so you receive a Programmed 20921435 Body Control Module that is ready for installation, saving you significant time, money, and hassle.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives pre-flashed to your exact VIN for a true plug-and-play installation, eliminating the need for dealer tools.
- ✔ Latest GM Software: Updated to the most current software version to ensure optimal performance and fix known factory bugs.
- ✔ Restores Full Functionality: Solves common electrical gremlins, restoring control over your lights, locks, windows, and security features.
- ✔ Cost-Effective Solution: Get the correct, programmed part without paying high dealership prices for the module and separate programming labor.
- ✔ Direct-Fit Replacement: Engineered to match the original part numbers, including 15921353, 20815898, 22860591, 25892622, and more, for a perfect fit.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Important Post-Installation Steps
While our programming handles the majority of the setup, some vehicles may require one or more of the following procedures to be performed with a professional scan tool after installation:
- Airbag System Sync: If the airbag light is on, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be required for proper brake light and traction control operation.
Note: Specific requirements can vary by model. Always consult a factory service manual or a qualified technician for guidance.
Guaranteed Vehicle Compatibility
This module is a direct replacement for a wide range of GM vehicles. Please verify your original part number against the list below. This part fits: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084. It is compatible with models such as the Cadillac STS, CTS, DTS; Chevrolet Equinox, Impala, Tahoe, Traverse, Express; GMC Acadia, Yukon, Savana; Buick Enclave, Lucerne; and more.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) is essential for us to program the Body Control Module correctly. It contains specific information about your vehicle’s security system, engine, transmission, and factory-installed options. Without it, the module will not communicate properly with your vehicle.
Is this module difficult to install?
The physical installation is typically straightforward for someone with basic mechanical skills. The BCM is often located under the dashboard on the driver’s or passenger’s side. The main challenge is programming, which we handle for you before shipping. Some models may require a simple relearn procedure after installation as noted above.
How do I know if my BCM has failed?
Common signs of a failing BCM include a cluster of seemingly unrelated electrical issues. This can range from flickering headlights and malfunctioning power windows to random security alerts and a car that won’t start. A professional diagnosis with a high-end scan tool can confirm the failure by checking for communication errors with the BCM.
What happens if I install this without any relearn procedures?
In many cases, the vehicle will start and run, and primary functions will be restored immediately. However, on some models, you may see a persistent warning light (like the airbag light) or notice that certain secondary functions are not working correctly until the final sync/relearn procedures are completed with a proper scan tool.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled part that has been programmed with the latest vehicle-specific software. It provides the same functionality and reliability as a much more expensive dealer part, making it an excellent and economical solution.