Is Your GM Truck or SUV Plagued by Baffling Electrical Issues?
If you’re dealing with a frustrating array of electrical problems in your Cadillac Escalade, Chevy Silverado, or GMC Sierra, a failing Body Control Module (BCM) is the likely culprit. The BCM acts as the central nervous system for your vehicle’s body electronics, managing everything from your power windows and door locks to your interior lights and HVAC system. When it starts to fail, it can create a cascade of seemingly unrelated symptoms that are often misdiagnosed, leading to costly and unnecessary repairs.
This genuine OEM-quality Body Control Module, corresponding to part number 15943678 and its interchanges, is the definitive solution. We pre-program the module to your vehicle’s specific VIN before shipping, ensuring it arrives ready for a simple, plug-and-play installation. This eliminates the need for expensive programming at a dealership, getting you back on the road quickly and affordably.
Solving Your Escalade Body Control Module Problems
A faulty BCM can manifest in numerous ways. This replacement module is engineered to resolve these common failures and restore your vehicle’s factory functionality. It’s the reliable fix for a wide range of GM trucks and SUVs, including the Tahoe, Suburban, Yukon, and Avalanche.
Symptoms and Key Features
- ✔ VIN-Programmed for Your Vehicle: Arrives ready for installation with the latest GM software, requiring no further dealership intervention.
- ✔ Restores Full Electrical Function: Corrects non-working power windows, door locks, exterior and interior lights, and windshield wipers.
- ✔ Fixes HVAC Malfunctions: Solves issues with an inoperative blower motor, erratic fan speeds, or unresponsive climate controls.
- ✔ Eliminates Security & Starting Problems: Addresses false security system alarms, intermittent stalling, and no-start conditions related to the BCM.
- ✔ Clears Diagnostic Trouble Codes (DTCs): Helps resolve persistent body-related codes, including the common airbag system code B1001 (post-installation SDM sync may be required).
- ✔ Guaranteed Compatibility: A direct replacement for a wide range of part numbers, including 15943678, 25844480, 25835966, 20939137, and 22860591.
- ✔ No Core Charge: Keep your old part without any additional fees or return hassles.
Installation and Post-Install Procedures
Physically installing the BCM is straightforward. It’s typically located under the driver’s side dashboard, near the steering column, and can be swapped in minutes. However, after installation, some vehicles may require additional electronic procedures for full system integration.
- Airbag System Sync: If your airbag warning light is on after installation (often with code B1001), a ‘Setup SDM Primary Key in BCM’ procedure must be performed using a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure proper brake light and traction control operation.
Always consult your vehicle’s factory service manual or a qualified technician for detailed instructions specific to your model.
Frequently Asked Questions
What does a Body Control Module do?
The BCM is a computer that controls and monitors most of your vehicle’s non-engine related functions, such as power windows, locks, lights, wipers, security system, and climate controls.
Will this BCM fix my airbag light?
This module can resolve BCM-related airbag codes like B1001, but it requires a post-installation procedure. You will need a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function to sync the modules and turn off the light.
Is this part difficult to install?
The physical replacement is very simple, usually taking less than 15 minutes with basic tools. However, be prepared for potential electronic relearn procedures, like the airbag system sync, which require a specific diagnostic tool.
Do I need to go to the dealer after installing this?
No. Because we pre-program the module to your VIN, you do not need to visit the dealer for initial programming, which saves you significant time and money. The only exception is if you need post-install procedures and don’t have the required tools.
How do I know if this is the right part for my truck?
This module is a direct replacement for a long list of interchangeable GM part numbers. As long as your vehicle is listed in our fitment guide and your original part number is on our interchange list, this module will work perfectly.
What does ‘VIN Programmed’ actually mean?
It means we load your vehicle’s unique 17-digit Vehicle Identification Number (VIN) and all its specific options into the module before we ship it. This makes the module a perfect electronic match for your truck, ensuring it works correctly right out of the box.