Restore Full Electrical Function to Your GM Vehicle
Is your Chevrolet Express van or other GM vehicle plagued by mysterious electrical problems? Flickering lights, malfunctioning power windows, or a security system that has a mind of its own are common indicators of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and seemingly unrelated issues. This replacement Body Control Module, part number 15880684, is the definitive solution to restore your vehicle’s factory performance and reliability.
From the Diagnostic Bay
We recently had a 2011 Express 2500 work van come into the shop with a list of baffling symptoms. The dome light would flicker, the driver’s side power window worked only when it wanted to, and the horn would chirp randomly when locking the doors. The owner had already spent money replacing switches and relays with no success. A full diagnostic scan revealed communication errors across multiple systems, all pointing back to a single culprit: the BCM. By installing a VIN-programmed Express 2500 Body Control Module like this one, we were able to resolve every single issue in one go. It wasn’t five different problems; it was one central component failure.
Common Symptoms of a Failing BCM
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your Body Control Module needs replacement:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior dome lights or exterior running lights staying on or failing to illuminate.
- ✔ The vehicle’s security system engaging randomly or preventing the engine from starting.
- ✔ Intermittent or non-functional windshield wipers and washers.
- ✔ False warnings on the instrument cluster, such as ‘Service Theft System’.
- ✔ Key fob functions like remote lock/unlock failing to work consistently.
- ✔ Radio or climate control systems behaving unpredictably.
The VIN-Programmed Advantage
Replacing a BCM isn’t as simple as swapping out the old part. Modern vehicles require the module to be programmed specifically to their Vehicle Identification Number (VIN) to communicate with other onboard computers. Our service eliminates the need for an expensive trip to the dealership. Simply provide us with your vehicle’s VIN at checkout, and our technicians will flash this module with the latest, most stable GM software for your exact configuration. This ensures that the Express 2500 Body Control Module integrates perfectly with your vehicle’s systems, making installation as straightforward as possible.
Important Post-Installation Information
While our programming makes this a near plug-and-play installation, some vehicles may require additional electronic relearn procedures after the new BCM is installed. These are standard procedures that can be performed by a qualified technician with a professional-grade scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM). This is only required if the light is on.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper operation of the brake lights and traction control system.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Broad GM Compatibility
This module, identified by part number 15880684 and its many alternates, is compatible with a wide range of General Motors vehicles beyond the Chevrolet Express and GMC Savana vans. It is the correct service replacement for models such as the Chevrolet Impala, Tahoe, Traverse, Cadillac DTS, GMC Acadia, and many more. Our VIN-specific programming ensures it will function correctly no matter which compatible vehicle you own.
Frequently Asked Questions
Why do you need my vehicle’s VIN?
Your VIN is essential for us to program the Body Control Module with the correct software and vehicle-specific options. This ensures the BCM communicates properly with your engine computer, transmission module, and other systems, restoring full factory functionality without needing a trip to the dealer for programming.
Is this BCM difficult to install?
The physical installation is typically straightforward, involving removing a few dash panels and disconnecting electrical connectors. However, as mentioned, some vehicles may require additional relearn procedures with a diagnostic tool after installation. We recommend installation by a professional mechanic or an experienced DIYer who has access to the necessary tools.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module without any additional fees or hassle.
What if my airbag light comes on after installation?
If the airbag light is on after you install the new BCM, it simply means the module needs to be electronically synced with your vehicle’s airbag system. A technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Will this fix all of my vehicle’s electrical problems?
This module will resolve any issues directly caused by a failing BCM. If your vehicle has other underlying electrical problems, such as a bad switch or wiring short, those will need to be addressed separately. A proper diagnosis is always the best first step.