Restore Your Truck’s Electrical System with a Reliable, Programmed BCM
Are you battling frustrating electrical gremlins in your 2002 Chevy Silverado or another GM truck? Flickering lights, a radio with a mind of its own, or power windows that refuse to cooperate are more than just annoyances—they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics. When it falters, it can cause a cascade of bizarre, unpredictable problems. This isn’t just a part; it’s the solution to getting your truck’s comfort and convenience features working like new again.
We take the guesswork and high costs out of the repair. Unlike a trip to the dealership, which involves towing, diagnostic fees, and programming charges, our BCM arrives at your door programmed with the latest GM software updates specifically for your vehicle. Simply provide your Vehicle Identification Number (VIN) at checkout, and we handle the rest. This ensures a seamless integration and restores original functionality, getting you back on the road with confidence.
A Technician’s Notebook
I remember a 2002 GMC Sierra 2500 that came into my bay with a truly baffling set of symptoms. The owner said his security light was always on, the power door locks worked intermittently, and the radio would shut off randomly. He had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a series of communication codes (U-codes) pointing to a network failure. The culprit? The BCM. On these specific GM platforms, I’ve seen moisture from a minor windshield leak drip down and corrode the BCM’s internal board over time. Replacing the faulty module with a pre-programmed unit like this one solved every single issue in under an hour, saving the customer hundreds compared to a dealership visit.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, mirrors, and door locks.
- ✔ The security or anti-theft light stays on, preventing the engine from starting (Passlock issues).
- ✔ Interior dome lights or dashboard lights flicker or fail to work correctly.
- ✔ The radio or infotainment system randomly turns on or off.
- ✔ Horn doesn’t work or sounds at random.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs) such as U1000, U1016, or various B-codes (e.g., B1001, B1004).
- ✔ False warnings on the driver information center (DIC).
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most compatible trucks (Silverado, Sierra, Tahoe), the BCM is located under the driver’s side of the dashboard, near the steering column. On vans (Astro, Safari), it’s typically found behind the center dash panel.
- ✔ 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 reconnect all the electrical harnesses. Ensure each connector clicks firmly into place.
- ✔ Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- ✔ Test Functionality: Start the vehicle and test all the components controlled by the BCM—windows, locks, radio, lights, and wipers—to confirm the repair was successful.
Important Post-Installation Notes
While this module is designed for a direct-fit installation, some vehicles may require additional steps to ensure all systems are perfectly synced. Please be aware of the following:
- Airbag System Sync: If your airbag warning light is illuminated after installation, 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: Some models may require a brake pedal position sensor relearn to ensure correct brake light operation and to satisfy the traction control system.
We always recommend consulting a factory service manual or a qualified technician if you are unsure about any part of the process.
Guaranteed Fitment for Your GM Vehicle
This Body Control Module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is compatible with the following models:
- Avalanche 1500: 2002 (4×2)
- Astro Van: 2002-2005
- Blazer S10 / Jimmy S15: 2002-2005
- Escalade: 2002 (4×2)
- S10 / S15 / Sonoma Pickup: 2002-2004
- Safari Van (GMC): 2002-2005
- Sierra 1500 / 2500 / 3500 / Denali Pickup: 2002
- Silverado 1500 / 2500 / 3500 Pickup: 2002
- Suburban 1500 / 2500: 2002
- Tahoe: 2002 (4×2)
- Yukon / Yukon XL 1500 / Yukon XL 2500: 2002
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you will need to provide us with your vehicle’s 17-digit VIN. Our technicians use this number to load the exact GM-certified software and vehicle-specific settings onto the BCM before it ships. This ensures it works correctly with the options your truck was built with.
Do I need to return my old BCM?
No, there is absolutely no core charge for this part. You can keep your original module, which saves you the time and expense of shipping a core back.
What does the Body Control Module (BCM) actually do?
The BCM acts as the brain for your vehicle’s body electronics. It controls features not related to the engine, such as power windows, power locks, the security system, interior and exterior lighting, the radio, and the instrument cluster warning lights.
Will this fix my ‘Service 4WD’ light?
While the BCM can be involved in the 4WD system, that light is more commonly caused by a faulty transfer case control module (TCCM), encoder motor, or dash switch. It’s important to get an accurate diagnosis before replacing parts.
Do I need special tools for the post-installation procedures?
Yes, procedures like the ‘Setup SDM Primary Key in BCM’ (for the airbag light) and the brake pedal position relearn require a bidirectional professional diagnostic tool, such as a Tech 2 or equivalent high-end scanner. Many local repair shops can perform these services for you if needed.