Is your 2002 GMC Sierra 2500 or another compatible GM vehicle acting possessed? Flickering lights, unresponsive power windows, a security system that won’t cooperate, or strange warning messages on the dash are all classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it malfunctions, it can cause a cascade of frustrating and seemingly unrelated issues. Stop chasing individual component failures and address the root cause with this direct-fit replacement BCM, part number 15081796.
This isn’t just a replacement part; it’s a complete solution. We pre-program this module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This critical step ensures compatibility with your vehicle’s options and security system, eliminating the need for an expensive trip to the dealership for programming. Simply provide your VIN after purchase, and we’ll handle the rest, loading it with the latest software updates from GM for optimal performance.
We had a 2002 Silverado in the shop where the owner had already replaced two power window switches and the headlight switch, but the problems persisted intermittently. The radio would sometimes not turn off, and the dome light had a mind of its own. A quick scan showed multiple communication errors with the BCM. Instead of continuing to replace perfectly good parts, we installed a VIN-programmed BCM. Instantly, all the strange electrical gremlins vanished. It’s a powerful reminder that the BCM is often the central culprit behind a host of electronic issues.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security or anti-theft system preventing the vehicle from starting.
- ✔ Horn honking unexpectedly or not working.
- ✔ Inaccurate or malfunctioning gauges on the instrument cluster.
- ✔ False warning messages like “Service Vehicle Soon” or “Security”.
- ✔ Intermittent no-start conditions where all power seems dead.
Solving the Problem with a Pre-Programmed 2002 Sierra 2500 BCM
Replacing your faulty module with our VIN-programmed 2002 Sierra 2500 BCM is the most effective way to restore your truck’s functionality. Because we flash the unit for you, installation is significantly simplified. In most cases, it’s a plug-and-play procedure. Please be aware of potential post-installation steps that may be required depending on your specific vehicle configuration.
Post-Installation Procedures:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper operation of the brake lights and traction control system.
This module is a direct replacement for part numbers 15081796, 15063578, 15095334, 19208537, DKAK, and DPNU, and fits a wide range of GM trucks, vans, and SUVs from 2002-2005. Please verify the part number on your original module to ensure compatibility.
Frequently Asked Questions
What does the Body Control Module (BCM) do?
The BCM is a computer that manages and controls many of your vehicle’s non-engine related electronic functions, such as power windows, locks, interior and exterior lighting, security system, wipers, and more.
Do I need to have this module programmed by a dealer?
No. The main benefit of our service is that we program the BCM to your vehicle’s VIN before we ship it to you. This saves you time and the expense of dealer programming.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to access the correct software and calibration files from GM for your specific vehicle. This ensures the BCM works correctly with the options and security system your truck was built with.
Is this BCM difficult to install?
The physical installation is typically straightforward, involving unplugging the old module and plugging in the new one. On most GM trucks, it’s located under the steering column. However, as noted, some vehicles may require a simple relearn procedure with a scan tool for the airbag or brake systems after installation.
What if my airbag light is on after I install the BCM?
This is a known possibility. It means the new BCM needs to be electronically introduced to the airbag system. A qualified technician with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module.