Restore Your Truck’s Electrical Functions and Get Back on the Road
Are you battling bizarre electrical problems in your GM truck or van? Intermittent power windows, flickering dash lights, a security system that acts up, or even a frustrating no-start condition can often be traced back to one component: the Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a failing BCM can turn a reliable vehicle into a source of constant headaches. It’s the central hub for all your vehicle’s comfort and convenience features, and when it goes, it can feel like the truck is haunted.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and high dealership costs out of the equation. By providing your Vehicle Identification Number (VIN) at checkout, you receive a BCM that is professionally programmed with the latest GM software specifically for your truck’s configuration. This ensures that all the electronic features your vehicle was built with will function correctly right out of the box. This is the same process used at the dealership, but without the hassle and extra expense of a service appointment.
A Technician’s Notebook: The Phantom Battery Drain
A customer brought in a 2002 Sierra 2500 with a battery that would be dead every morning. He’d already replaced the battery and alternator twice. After hooking up an ammeter, I saw a significant parasitic draw. Instead of pulling fuses for hours, I went straight to the BCM data stream with my scan tool. I saw the BCM was keeping the interior lighting relay and radio circuits awake long after the key was off. This internal failure was slowly draining the life out of his battery. A new, correctly programmed BCM solved the issue instantly. It’s a classic failure I’ve diagnosed on hundreds of these GM platforms.
Is Your GM Truck Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ 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 security or anti-theft system preventing the engine from starting (Security light on).
- ✔ Gauges on the instrument cluster behaving strangely or not working.
- ✔ Radio or climate control issues that seem to have no cause.
- ✔ Communication error codes, often in the U-series (e.g., U0140, U0155), indicating the BCM isn’t talking to other modules.
- ✔ False warnings on the driver information center.
Your Straightforward BCM Installation Guide
Installing your new 2002 Silverado BCM is a manageable job for a DIYer with basic tools. While the exact location varies slightly by model (see fitment list), the general process is consistent.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes to allow all modules to power down completely.
- Locate the BCM: On most trucks and SUVs like the Silverado and Tahoe, it’s located under the driver’s side of the dashboard, near the steering column. On vans like the Astro and Safari, it’s typically behind the center dash panel.
- Remove Trim Panels: You may need to remove the lower dash knee bolster or other plastic trim panels to gain access. These are usually held by a few screws or clips.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Seat your new, pre-programmed BCM into the mounting bracket and secure it. Reconnect all electrical connectors, ensuring they click firmly into place.
- Reassemble and Reconnect: Reinstall any trim panels you removed. Finally, reconnect the negative battery terminal.
- Perform Relearns (If Needed): Start the vehicle. In some cases, you may need to perform a Brake Pedal Position relearn or an Airbag System sync as detailed in our post-install section.
Verified Vehicle Compatibility List
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 vehicles:
- Chevrolet Silverado 1500, 2500, 3500: 2002 (under steering column)
- GMC Sierra 1500, 2500, 3500, Denali: 2002 (under steering column)
- Chevrolet Tahoe / Suburban 1500, 2500: 2002 (4×2 models, under steering column)
- GMC Yukon / Yukon XL 1500, 2500: 2002 (4×2 models, under steering column)
- Cadillac Escalade: 2002 (4×2 models, under steering column)
- Chevrolet Avalanche 1500: 2002 (4×2 models, under steering column)
- Chevrolet S10 / GMC Sonoma: 2002-2004 (center dash)
- Chevrolet Blazer / GMC Jimmy: 2002-2005 (center dash)
- Chevrolet Astro / GMC Safari: 2002-2005 (center dash)
Frequently Asked Questions
Do I need to do any programming myself?
No. This BCM arrives fully programmed to your vehicle’s specific VIN. It’s a plug-and-play installation, though some minor relearn procedures may be needed post-install depending on your exact model.
Do I have to return my old BCM?
No, there is no core charge for this part. You can keep your original module.
What if my airbag light comes on after installation?
This is uncommon but can happen. It means the new BCM needs to be synced with the airbag module (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ will need to be performed with a professional-grade scan tool to resolve it.
What is the Brake Pedal Position Relearn?
On some models, the BCM needs to relearn the position of the brake pedal sensor to ensure brake lights and stability control work correctly. This is a simple procedure that can often be done with a capable bidirectional scan tool.
How do I find my original part number?
The part number is printed on a white sticker on the case of your original BCM. You will need to access the module to read it. However, as long as your vehicle is on our fitment list, this module will work.
Why should I buy from you instead of a dealer?
We provide a cost-effective and convenient solution. You get a BCM programmed with the latest software without needing to pay for dealer labor or schedule a service appointment, saving you significant time and money.