Restore Your Truck’s Electrical System with a Reliable, Pre-Programmed BCM
Are you tired of chasing electrical gremlins in your 2002 GMC Sierra 3500? Intermittent power windows, flickering lights, a security system that has a mind of its own, or strange gauge behavior are classic signs of a failing Body Control Module (BCM). These issues aren’t just annoying; they can affect your truck’s security and functionality. Instead of paying for expensive diagnostic time and programming fees at a dealership, get the definitive solution delivered to your door. This BCM arrives fully programmed to your vehicle’s specific VIN with the latest GM software updates, ensuring a seamless and effective repair.
From the Diagnostic Bay
I remember a 2002 Silverado 2500 that came into my shop with a truly baffling set of symptoms. The owner said the radio would sometimes turn off, the dome light would stay on for hours, and occasionally, the truck just wouldn’t start—no crank, nothing. He’d already replaced the battery and checked the alternator. We scanned it and found a slew of communication (U-series) codes pointing to a network issue. After tracing the wiring, we isolated the problem to the BCM. It was failing internally, causing data corruption on the Class 2 serial data line. Installing a pre-programmed 2002 Sierra 3500 BCM like this one resolved every single issue instantly. It’s a common failure point on these GM trucks, and a properly programmed module is the only correct fix.
Is Your GM Truck Showing These Electrical Gremlins?
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights staying on or not turning on correctly.
- ✔ The security or anti-theft system preventing the engine from starting (Security light on).
- ✔ Unresponsive key fob or remote entry functions.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Communication error codes (like U0140, U0155) stored in other modules.
- ✔ The radio or climate control system turning on and off by itself.
A Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a confident DIYer. While the exact location can vary slightly, 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 about 10 minutes to ensure all systems are powered down.
- Locate the BCM: On your 2002 Sierra 3500, the BCM is typically located under the steering column, often attached to a metal bracket. You may need to remove the lower dash panel for access.
- Disconnect Wiring: Carefully unplug the multiple electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them. Note their orientation.
- Remove the Old Module: Unbolt or unclip the old BCM from its mounting bracket and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and reconnect all the electrical connectors securely.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. As noted in our procedures, a relearn for the airbag or brake pedal position sensor may be required if you see any warning lights.
Verified Fitment for Your GM Truck or Van
This BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit 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)
- Chevrolet Tahoe / Suburban 1500 / 2500: 2002 (4×2 for 1500, under steering column)
- GMC Yukon / Yukon XL 1500 / 2500: 2002 (4×2 for 1500, under steering column)
- Cadillac Escalade: 2002 (4×2, under steering column)
- Chevrolet Blazer S10 / S10 Pickup: 2002-2005 (center dash)
- GMC Jimmy S15 / Sonoma: 2002-2004 (center dash)
- Chevrolet Astro Van: 2002-2005 (center dash)
- GMC Safari Van: 2002-2005 (center dash)
Please verify your original part number or consult the fitment list to ensure compatibility. The pre-programming service makes this a vehicle-specific part.
Frequently Asked Questions
Do I need to send you my VIN?
Yes. We cannot ship your order until we receive your vehicle’s 17-digit VIN. This is essential for us to program the BCM with the correct software and vehicle options, ensuring it works correctly right out of the box.
Is any additional programming needed after installation?
In most cases, no. The module is sent fully programmed. However, on some models, if the airbag light appears, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed with a scan tool. A brake pedal position relearn may also be required.
What is a core charge? Do I need to return my old BCM?
There is absolutely no core charge for this part. You can keep your old BCM, saving you the time and expense of a return shipment.
Where is the BCM located on my 2002 Sierra 3500?
On the 2002 GMC Sierra and Chevrolet Silverado trucks, the Body Control Module is typically found under the driver’s side dashboard, near the steering column.
Will this fix my ‘Security’ light issue?
A failing BCM is a very common cause of an illuminated ‘Security’ light and no-start conditions in these GM vehicles. This programmed BCM is the correct solution for that problem, as it restores proper communication with the vehicle’s anti-theft system.