Restore Your Truck’s Brain and End Electrical Chaos
If you’re dealing with a 2002 GMC Sierra or a similar GM truck that seems to have a mind of its own—flickering lights, malfunctioning power windows, a stubborn security system, or intermittent starting issues—the root cause is very often a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can create a cascade of frustrating and unpredictable problems. I’ve seen it hundreds of time in my shop: a customer comes in thinking they have a dozen different issues, when in reality, it’s just this one component failing.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and dealer expense out of the equation. Simply provide your vehicle’s VIN during checkout, and our technicians will program this BCM with the latest official GM software specific to your truck. It arrives at your door ready to install, eliminating the need for expensive dealership programming or specialized scan tools for the initial setup. This is the most direct path to getting your vehicle’s essential functions back to factory-perfect operation.
From the Diagnostic Bay: The Case of the Haunted Truck
A customer brought in his 2002 Silverado 1500, convinced it was possessed. The dome lights would flash randomly, the radio would turn on and off, and sometimes the truck just wouldn’t start, leaving the security light blinking on the dash. He’d already replaced the battery and checked the alternator. After hooking up my diagnostic tool, I saw several communication error codes pointing toward the BCM. Instead of a costly diagnostic rabbit hole, we focused on the central hub. By replacing the original module with a pre-programmed 2002 Sierra BCM, all the bizarre electrical gremlins vanished. It’s a classic example of how one failing module can mimic multiple unrelated problems.
Is Your GM Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty Body Control Module is a likely culprit:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior dome lights or exterior lights staying on or not turning on.
- ✔ The anti-theft or security light is illuminated, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U-series codes (e.g., U0140, U0155) stored in the system.
- ✔ Wipers activating on their own or not responding to the switch.
Your Straightforward BCM Installation Guide
Installing your pre-programmed 2002 Sierra BCM is a manageable job for a confident DIYer. While the exact location can vary, on most trucks like the Sierra and Silverado, you’ll find it under the driver’s side of the dashboard.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning.
- Locate the BCM: On most 2002 GM trucks, the BCM is located under the steering column, often attached to a metal bracket. On vans like the Astro/Safari, it’s typically behind the center dash.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting location.
- Install the New Module: Mount your new, pre-programmed BCM in the same spot and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Steps: Start the vehicle. In some cases, you may need to perform a post-install procedure like an Airbag System Sync or Brake Pedal Position Relearn if related warning lights appear. See our FAQ for more details.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following models:
- Cadillac Escalade: 2002 (4×2)
- Chevrolet Avalanche 1500: 2002 (4×2)
- Chevrolet Astro Van: 2002-2005
- Chevrolet Blazer S10: 2002-2005
- Chevrolet S10 Pickup: 2002-2004
- Chevrolet Silverado 1500/2500/3500 Pickup: 2002
- Chevrolet Suburban 1500/2500: 2002
- Chevrolet Tahoe: 2002 (4×2)
- GMC Jimmy S15: 2002-2005
- GMC Safari Van: 2002-2005
- GMC Sierra 1500/2500/3500 Pickup: 2002
- GMC Sierra Denali: 2002
- GMC Sonoma: 2002-2004
- GMC Yukon & Yukon XL 1500/2500: 2002
Note: Please confirm your part number or contact us with your VIN to ensure compatibility.
How do I provide my VIN for programming?
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions to reply with your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive your VIN, as we program the module specifically for your vehicle’s configuration.
Is this part truly plug-and-play?
Yes, for the vast majority of functions. Because we program it to your VIN, it will control the main features like lights, windows, and locks upon installation. However, in some vehicles, security systems like the airbag (SRS) may require a ‘re-sync’ procedure with a professional scan tool if the warning light appears.
What if my airbag light is on after I install it?
This is a known possibility. The BCM and the airbag’s SDM (Sensing and Diagnostic Module) are linked. If the light is on, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a compatible scan tool to sync the two modules and clear the light.
Do I need to return my old BCM?
No. This product comes with absolutely no core charge. You can keep your original module, which is great if you want to hold onto it or avoid the hassle of shipping it back.
Where is the BCM located on my 2002 Sierra?
On the 2002 GMC Sierra, Silverado, Tahoe, and other full-size trucks/SUVs, the BCM is located under the driver’s side dashboard, typically to the left of the steering column. On vans like the Astro and Safari, it’s usually found behind the center dash/radio area.