End the Electrical Headaches in Your GM Truck or Van
If you’re dealing with flickering lights, power windows with a mind of their own, or a security light that won’t turn off, you’re likely facing a failing Body Control Module (BCM). As the central nervous system for your vehicle’s accessories, a faulty BCM can cause some of the most frustrating and difficult-to-diagnose problems. In my 20+ years in the shop, I’ve seen these modules cause chaos, turning a reliable truck into a source of daily annoyance. This isn’t just an inconvenience; it can affect vehicle security and safety systems.
We offer a straightforward, reliable solution. This Body Control Module is not just a replacement part; it’s a complete fix that arrives at your door ready for installation. We take your vehicle’s VIN and professionally program the module with the latest GM software updates before it ships. This critical step eliminates the need for an expensive trip to the dealership for programming, saving you both time and money. Restore full functionality to your vehicle with a part you can trust.
From the Diagnostic Bay
A customer brought in his 2002 GMC Sierra 1500 last month with a classic case of BCM failure. His power locks were working intermittently, the dome light wouldn’t turn off, and the ‘Security’ light was constantly illuminated on the dash, sometimes preventing the truck from starting. He was worried about a huge repair bill. After confirming the BCM was the culprit, we ordered one of these pre-programmed units. The installation was simple, and because it was already flashed to his VIN, the truck started right up. After performing the quick post-install procedures, all the electrical gremlins were gone. He drove away with a perfectly functioning truck for a fraction of what the dealer would have charged.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Erratic or non-functional power windows and door locks
- ✔ Interior or exterior lights that stay on or won’t turn on
- ✔ The security system light is on, or the vehicle won’t start
- ✔ Horn honking unexpectedly or not working at all
- ✔ Wipers activating on their own or not responding
- ✔ False warnings or messages on the instrument cluster
- ✔ Communication errors with other vehicle modules (DTCs)
A Straightforward Guide to Your BCM Swap
Installing your new 2002 Sierra Body Control Module is a manageable job for a confident DIYer. The key is taking your time and following the proper post-installation steps.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most 2002 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column. On vans like the Astro/Safari and S-10 models, it’s often behind the center dash.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Procedures: Follow the critical post-installation steps outlined below to ensure all systems, including safety features, are working correctly.
Critical Post-Installation Steps: Do Not Skip!
After replacing your BCM, these procedures are essential for safety and proper operation. Failure to perform them may result in warning lights or improperly functioning systems.
- Airbag System Reset: The airbag warning light will likely be on. You must perform the ‘Setup SDM Primary Key in BCM’ procedure using a professional-grade diagnostic tool. This re-establishes communication between the BCM and the airbag system.
- Brake Pedal Position Sensor Relearn: Some vehicles require a recalibration of the brake pedal position sensor. This ensures the brake lights and stability control systems function correctly. This also typically requires a capable scan tool.
Note: If you are not equipped to perform these relearn procedures, a local independent shop can typically complete them for you quickly.
Verified Vehicle Compatibility List
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 Avalanche 1500 (2002): 4×2 models
- Chevrolet Blazer S10 (2002-2005)
- Chevrolet S10 Pickup (2002-2004)
- Chevrolet Silverado 1500 / 2500 / 3500 Pickup (2002)
- Chevrolet Suburban 1500 / 2500 (2002): 4×2 models
- Chevrolet Tahoe (2002): 4×2 models
- Chevrolet Astro Van (2002-2005)
- GMC Jimmy S15 (2002-2005)
- GMC Sonoma S15 Pickup (2002-2004)
- GMC Sierra 1500 / 2500 / 3500 Pickup (2002)
- GMC Sierra Denali (2002)
- GMC Yukon (2002): 4×2 models
- GMC Yukon XL 1500 / 2500 (2002): 4×2 models
- GMC Safari Van (2002-2005)
- Cadillac Escalade (2002): 4×2 models
This is the definitive solution for your 2002 Sierra Body Control Module needs, ensuring a perfect match and seamless integration once programmed to your VIN.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors many of the non-engine related electronic functions, such as power windows, locks, lights, wipers, security system, and the horn.
Why is providing my VIN so important for this part?
Your VIN allows us to program the BCM with the specific software and settings for your vehicle’s exact options and features. This makes the installation process much simpler and ensures everything works correctly without a trip to the dealer.
Will this fix the ‘Security’ light on my dashboard?
In many cases, yes. A faulty BCM is a very common cause of a persistent security light and related no-start issues on these GM vehicles. This programmed module is designed to resolve that communication error.
How do I find my original BCM part number to be sure this fits?
The part number is printed on a sticker directly on your original BCM. You will need to access the module (typically under the dash) to read it. Match it to one of the compatible numbers listed above.
What tools are needed for the post-installation procedures?
The airbag system reset and brake sensor relearn require a bi-directional diagnostic scan tool, which is more advanced than a basic code reader. Most professional repair shops have this equipment.