Restore Full Electrical Control to Your GM Truck or Van
If you’re dealing with bizarre electrical problems in your 2002 Silverado, Sierra, or other compatible GM vehicle, you’re not alone. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of constant frustration. One minute your power windows work, the next they don’t. The security light might flash for no reason, or worse, the vehicle won’t start at all. This isn’t just an annoyance; it’s a breakdown of your vehicle’s central nervous system.
This replacement BCM, part number 15081796, is the definitive solution. We take the guesswork and hassle out of the repair. Before this module ships, we program it with the latest GM software using your vehicle’s specific VIN. This means it arrives at your door ready for installation, saving you a costly trip to the dealership for programming. It’s a direct-fit replacement that restores the original functionality and reliability you depend on, day in and day out.
A Technician’s Notebook: The Case of the Phantom Drain
I once had a 2002 GMC Sierra in my bay with a classic BCM failure symptom: a dead battery every morning. The owner had already replaced the battery and alternator. After checking for parasitic draws, I traced it to the BCM, which was failing to let other modules go to ‘sleep’ after the key was off. It was a slow, silent drain. Installing a pre-programmed BCM like this one not only fixed the battery drain but also resolved other intermittent issues the owner hadn’t even mentioned, like the dome light staying on. It’s a perfect example of how one part can solve a dozen confusing problems.
Is Your GM Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. These issues are often intermittent at first but will worsen over time.
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft light is on, preventing the engine from starting (a common Passlock issue).
- ✔ Horn sounding randomly or not working when pressed.
- ✔ Wipers activating on their own or not functioning correctly.
- ✔ False warnings on the instrument cluster (e.g., ‘Door Ajar’).
- ✔ Communication error codes, such as U0140, stored in other modules.
Your Straightforward BCM Installation Guide
Installing your new 2002 Silverado BCM is a manageable job for a confident DIYer. While the exact location can vary slightly by model (see fitment list), the process is generally the same. Always prioritize safety.
- Step 1: Disconnect Power. Always begin by disconnecting the negative terminal from your vehicle’s battery to prevent electrical shorts.
- Step 2: Locate the BCM. On most 2002 GM trucks like the Silverado and Sierra, the BCM is located under the driver’s side of the dashboard, near the steering column. On vans like the Astro and Safari, it’s often behind the center dash panel.
- Step 3: Remove the Old Module. Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Step 4: Install the New BCM. Mount your new, pre-programmed module in place and securely reconnect all electrical connectors. Ensure they click into place.
- Step 5: Reconnect and Test. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.
- Step 6: Perform Relearns if Necessary. As noted below, some vehicles may require an airbag system sync or a brake pedal position relearn if specific warning lights appear. This typically requires a professional scan tool.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
- Chevrolet Silverado 1500/2500/3500 Pickup (2002): Body Control (BCM); (under steering column)
- GMC Sierra 1500/2500/3500/Denali Pickup (2002): Body Control (BCM); (under steering column)
- Chevrolet Avalanche 1500 (2002): Body Control (BCM); (under steering column), 4×2
- Chevrolet Blazer S10 / GMC Jimmy S15 (2002-2005): Body Control (BCM); (center dash)
- Chevrolet S10 / GMC Sonoma S15 (2002-2004): Body Control (BCM); (center dash)
- Chevrolet Suburban 1500/2500 (2002): Body Control (BCM); (under steering column), check options
- Chevrolet Tahoe (2002): Body Control (BCM); (under steering column), 4×2
- GMC Yukon / Yukon XL 1500/2500 (2002): Body Control (BCM); (under steering column), check options
- Cadillac Escalade (2002): Body Control (BCM); (under steering column), 4×2
- Chevrolet Astro Van (2002-2005): Body Control (BCM); (center dash)
- GMC Safari Van (2002-2005): Body Control (BCM); (center dash)
Frequently Asked Questions
Frequently Asked Questions
How does the VIN programming work?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to load the correct, factory-approved software for your specific vehicle configuration onto the BCM before it is shipped to you.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module, which can be helpful for cross-referencing part numbers or for any future needs.
What is the ‘Airbag System Sync’ procedure?
On some models, the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). If your airbag warning light is on after installation, a shop with a high-level scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve it.
Will I need to perform a brake pedal position relearn?
It’s possible. This procedure recalibrates the sensor that tells the BCM the brake pedal’s position. It’s important for correct brake light operation and traction control. If you notice any issues with these systems, this relearn may be required.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, it’s very manageable. The main challenge is typically accessing the module under the dash. Since our 2002 Silverado BCM comes pre-programmed, you avoid the most complex part of the job, which is the software installation.
How can I be sure this is the correct part for my truck?
The best way is to match the part number from your original BCM to one of the numbers listed: 15063578, 15081796, 15095334, 19208537, DKAK, or DPNU. You can also use the detailed fitment list provided on this page to confirm compatibility with your make, model, and year.