Are you battling frustrating electrical gremlins in your GM truck or van? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up on its own are often signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a wide range of confusing and intermittent problems. This replacement BCM, part number 15081796, is the definitive solution to restore full functionality and reliability to your vehicle.
We had a 2002 Chevy Silverado in the shop that was driving the owner crazy. The dome lights would stay on, draining the battery overnight, and the radio would randomly shut off. He’d already replaced the battery twice. After checking the wiring, we hooked up our scan tool and found communication faults pointing directly to the BCM. We installed a VIN-programmed module just like this one, and it was like flipping a switch. All the strange electrical issues vanished, and the truck was back to being the reliable workhorse it was meant to be. A faulty BCM can mimic a dozen other problems, but replacing it is often the one true fix.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, mirrors, or door locks working intermittently or not at all.
- ✔ The security system or anti-theft light staying on, preventing the vehicle from starting.
- ✔ Unresponsive key fob or remote entry system.
- ✔ Warning lights on the dashboard appearing for no reason.
- ✔ Communication errors when using a diagnostic scan tool.
Solving Your 2002 Sierra Denali BCM Issues
Don’t let a faulty module keep your truck off the road. This BCM is a direct-fit replacement for a wide range of 2002-2005 GM vehicles, including the GMC Sierra, Chevy Silverado, Tahoe, Suburban, and Astro/Safari vans. To ensure a seamless installation, we program the module to your vehicle’s specific VIN before it ships. This critical step loads the latest GM software and configures the BCM for the exact options your vehicle was built with, saving you a costly trip to the dealership for programming.
Installation and Post-Install Notes:
While this module is designed for a straightforward installation, some vehicles may require additional steps after the part is installed. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with 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 needed to ensure proper operation of the brake lights and traction control system.
Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
This module is a direct replacement for part numbers: 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, security system, and interior accessories.
Do I need to have this BCM programmed?
No. We handle the programming for you before shipment. Simply provide us with your vehicle’s VIN after you place your order, and we will flash the module with the latest GM software specific to your truck.
Is this part truly plug-and-play?
For many vehicles, yes. However, as noted, some models may require a simple relearn procedure for the airbag system or brake pedal position sensor after installation. This is a normal part of replacing a modern vehicle computer.
What happens if my airbag light is on after I install the BCM?
This indicates that the new BCM needs to be synchronized with your vehicle’s existing airbag system (SDM). A technician with a professional diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
How do I give you my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive and validate your VIN for programming.