Restore Full Functionality to Your GM Truck or Van
If you’re dealing with bizarre electrical problems in your 2002 GMC Sierra or a similar GM vehicle, a failing Body Control Module (BCM) is often the culprit. As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating issues, from flickering lights and malfunctioning power windows to a vehicle that won’t start at all. This isn’t just an inconvenience; it can be a serious safety concern.
We offer a straightforward, reliable solution. This Body Control Module, compatible with part number DPNU and others, arrives at your door pre-programmed with the latest GM software, specifically flashed to your vehicle’s VIN. This critical step eliminates the need for an expensive trip to the dealership for programming. You get a part that’s ready for installation, designed to restore the precise electronic functions your vehicle had when it left the factory.
Case Study: A Tricky Diagnosis
A customer brought in his ’02 Silverado 2500 with a laundry list of complaints: the dome light stayed on, the driver’s power window worked intermittently, and the radio would sometimes shut off on its own. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed communication errors between several modules, all pointing back to the BCM. These early 2000s GM BCMs are notorious for internal solder joint failures. We installed one of our VIN-programmed modules, performed the necessary key relearn, and all the ghost-like electrical issues were gone. It’s a common failure I’ve seen hundreds of times, and a new BCM is the definitive fix.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Erratic instrument cluster behavior, such as gauges dropping to zero or warning lights flashing randomly.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ HVAC (heating and air conditioning) controls not responding correctly.
- ✔ Communication errors (U-codes) stored when checked with a professional scan tool.
A Straightforward Guide to Your BCM Swap
Replacing the BCM is a manageable job for a DIY enthusiast. While the exact location varies slightly by model (see fitment list), the process is generally similar.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most trucks like the Sierra/Silverado, it’s located under the driver’s side of the steering column. On vans like the Astro/Safari, it’s typically behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the old BCM from its mounting bracket.
- Install the New Module: Bolt your new, pre-programmed BCM into place. Reconnect all the electrical harnesses, ensuring they click securely into place.
- Reconnect Battery: 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 Required
After installing your new 2002 Sierra BCM, you MUST perform a few final procedures to sync the module with your vehicle’s other systems. Failure to do so can result in warning lights and non-functional systems.
- Airbag System Reset: The airbag warning light will be on. You must use a bi-directional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system (SDM).
- Brake Pedal Position Sensor Relearn: Some vehicles may require a brake pedal position sensor recalibration. This ensures the brake lights and stability control systems function correctly.
- Security Relearn Procedure: Your vehicle’s anti-theft system will likely need to be relearned to the new BCM. This procedure typically involves cycling the key in the ignition and can often be done without special tools.
Note: If you are not comfortable with these procedures, we strongly recommend seeking assistance from a qualified professional mechanic.
Verified Vehicle Compatibility List
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It fits the following vehicles:
- GMC Sierra 1500 / 2500 / 3500 / Denali: 2002 (under steering column)
- Chevrolet Silverado 1500 / 2500 / 3500: 2002 (under steering column)
- Chevrolet Avalanche 1500: 2002 (4×2, under steering column)
- Cadillac Escalade: 2002 (4×2, under steering column)
- GMC Yukon / Yukon XL 1500 / Yukon XL 2500: 2002 (4×2 for 1500 models, under steering column)
- Chevrolet Suburban 1500 / 2500: 2002 (4×2 for 1500 models, under steering column)
- Chevrolet Tahoe: 2002 (4×2, under steering column)
- Chevrolet Blazer S10 / GMC Jimmy S15: 2002-2005 (center dash)
- Chevrolet S10 / GMC Sonoma: 2002-2004 (center dash)
- Chevrolet Astro Van: 2002-2005 (center dash)
- GMC Safari Van: 2002-2005 (center dash)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipment. Simply provide us with your vehicle’s 17-digit VIN during checkout, and we will flash the module with the latest GM software specific to your truck or van.
Is this a simple plug-and-play part?
It is plug-in, but not entirely ‘play’. While the physical installation is straightforward and no programming is needed, you must perform the post-installation procedures like the Airbag System Reset and Security Relearn to fully integrate the module with your vehicle.
Will this fix my ‘Service 4WD’ light?
A failing BCM can sometimes cause false warning messages, including for the 4WD system, by disrupting communication on the data bus. While it can be the cause, you should always perform a proper diagnosis, as the issue could also be with the transfer case control module (TCCM) or other components.
What tools do I need for the post-installation procedures?
The security relearn can often be done without tools. However, the mandatory ‘Setup SDM Primary Key in BCM’ for the airbag light requires a professional-grade, bi-directional scan tool. Many local repair shops can perform this service for you if you don’t own one.
How do I find my original part number?
The part number is printed on a sticker on the case of your original BCM. You will need to remove the module to see it. However, as long as your vehicle is on our compatibility list, this module will work, as we program it based on your VIN, not the old part number.