Is Your GM Truck or Van Plagued with Electrical Gremlins?
If you’re dealing with bizarre and frustrating electrical issues in your 2002 Chevrolet Avalanche, Silverado, Tahoe, or other compatible GM vehicle, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central hub for your vehicle’s body electronics, controlling everything from power windows and locks to the interior lights and security system. When it starts to fail, it can create a cascade of problems that are often difficult to diagnose.
From the Diagnostic Bay
We had a 2002 Sierra 2500 in the shop where the owner had already replaced the driver’s side window motor twice, but the window would still work intermittently. He was convinced he kept getting faulty parts. After a quick scan, we saw communication fault codes with the BCM. Instead of throwing more parts at it, we identified the root cause: a faulty BCM. A new, programmed module had all the electronics, including that stubborn window, working perfectly in under an hour. Don’t chase symptoms; fix the source.
Common Symptoms of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior dome lights or exterior lights staying on or not turning on.
- ✔ The security light is illuminated on the dashboard, or the vehicle won’t start.
- ✔ Windshield wipers behaving unpredictably (e.g., won’t turn off).
- ✔ The radio or climate control system is malfunctioning.
- ✔ False warning messages appearing on the driver information center.
Installing Your 2002 Avalanche BCM
This isn’t just a replacement part; it’s a complete solution. We take the hassle out of the repair by pre-programming this Body Control Module to your vehicle’s specific VIN before it ships. This means you can avoid a costly trip to the dealership for programming. The process is designed to be as simple as possible: locate your old module (typically under the steering column or in the center dash), disconnect the battery, swap the modules, and reconnect everything. While the physical installation is straightforward, please be aware of potential post-install procedures.
Post-Installation Requirements:
- Airbag System Sync: If the airbag warning light is on after you install the module, 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 some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control function correctly.
This module is a direct replacement for part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. Restore your vehicle’s functionality and peace of mind with a reliable, VIN-programmed BCM.
Frequently Asked Questions
What does ‘programmed to my VIN’ mean?
It means we load your vehicle’s specific factory software and settings onto the BCM using your Vehicle Identification Number (VIN). This ensures the module works correctly with the options your vehicle was built with, saving you a trip to the dealer for programming.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we have this information to perform the programming service.
Is this part difficult to install?
The physical installation is typically simple, involving unplugging the old module and plugging in the new one. However, as noted, some vehicles may require additional electronic relearn procedures with a professional scan tool for systems like the airbags or brakes.
Will this fix my ‘Security’ light and no-start issue?
A faulty BCM is a very common cause of security system issues, including a persistent ‘Security’ light and the engine refusing to start. Replacing it with a properly programmed module often resolves these problems.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module.
What if my airbag light comes on after installation?
This indicates the new BCM needs to be electronically synced with your vehicle’s airbag system (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed by a qualified technician with a high-level diagnostic tool.