If your 2002 GMC Sierra Denali is suddenly possessed by electrical gremlins—power windows with a mind of their own, flickering dash lights, or a security system that leaves you stranded—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, when the BCM goes down, it creates a cascade of frustrating and unpredictable problems. I’ve spent two decades under the hoods of these GM trucks, and I can tell you that a faulty BCM is one of the most common sources of these baffling issues.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and the expensive trip to the dealership out of the equation. Simply provide your vehicle’s VIN after purchase, and we will program this BCM with the very latest GM software specific to your 2002 Sierra Denali BCM. It arrives at your door ready to install, saving you hundreds in programming fees and diagnostic headaches. Get your truck’s features working reliably again and restore communication between its vital electronic systems.
A Technician’s Notebook
I remember a 2002 Yukon XL that came into the shop. The owner was fed up. His radio would turn on and off randomly, the power locks worked intermittently, and the security light was always on, sometimes preventing the truck from starting. He’d already replaced the battery and checked all the fuses. We plugged in the scanner and saw a slew of U-codes (communication errors) pointing to the BCM. Instead of a costly diagnostic rabbit hole, we installed a VIN-programmed BCM. In under an hour, every single one of his electrical issues was gone. It’s a textbook example of how a failing 2002 Sierra Denali BCM can mimic a dozen other problems.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, causing no-start conditions.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warning messages on the driver information center (DIC).
- ✔ Diagnostic trouble codes (DTCs) related to lost communication, such as U0140, U0155, or various B-codes.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On most trucks like the Sierra, Silverado, and Yukon, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black plastic box with several large multi-pin connectors.
- ✔ Remove the Old Module: Carefully unplug all electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- ✔ Reconnect Power: Reconnect the negative battery terminal.
- ✔ Perform Relearns (If Needed): Start the vehicle and check all functions. Refer to the post-installation procedures below if you see an airbag light or have brake system issues.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following GM vehicles:
- GMC Sierra Denali: 2002
- GMC Sierra 1500/2500/3500 Pickup: 2002
- Chevrolet Silverado 1500/2500/3500 Pickup: 2002
- GMC Yukon & Yukon XL: 2002 (4×2 Models)
- Chevrolet Tahoe & Suburban: 2002 (4×2 Models)
- Chevrolet Avalanche 1500: 2002 (4×2 Models)
- Cadillac Escalade: 2002 (4×2 Models)
- Chevrolet S10 / GMC Sonoma: 2002-2004
- Chevrolet Blazer / GMC Jimmy: 2002-2005
- Chevrolet Astro / GMC Safari Van: 2002-2005
Note: Please verify your original part number or consult the detailed fitment list in the original product data to ensure a perfect match for your specific vehicle and options.
Important Post-Installation Information
While our programming handles the majority of the setup, some vehicles may require additional synchronization steps after installation. This is a normal part of the process.
- Airbag System Sync: If the airbag warning light is on after you install the BCM, a simple ‘Setup SDM Primary Key in BCM’ procedure must be performed with a bi-directional scan tool. This syncs the new BCM with your vehicle’s airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary. This ensures your brake lights and traction control system function correctly. This also requires a capable diagnostic tool.
We believe in full transparency. These procedures are not always required, but it’s important for you to be aware of them. A local repair shop can typically perform these relearns quickly if needed.
Frequently Asked Questions
Do I have to send my old BCM back?
No. This purchase comes with no core charge. You can keep your original module, which can be helpful for future reference or troubleshooting if needed.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive your VIN, as the programming is specific to your truck.
Is this a simple plug-and-play installation?
For the most part, yes. Because we pre-program it to your VIN, you will not need to have it programmed at a dealership. However, as noted, some vehicles may require an additional Airbag or Brake Pedal Position relearn procedure with a scan tool after installation.
What if my original part number is not on your list?
This module replaces several part numbers, including 15063578, 15081796, and DPNU. If your part number is listed, it is the correct fit. If you are unsure, please contact us with your VIN and original part number before ordering.
Will this fix my no-start problem?
If your no-start issue is caused by the factory anti-theft system (Passlock/Passkey) being triggered by a faulty BCM, then yes, this programmed module is the correct solution. It restores proper communication and allows the vehicle to start.