Restore Your Truck’s Electrical System with a Plug-and-Programmed BCM
If you’re dealing with the frustrating and unpredictable electrical gremlins common in early 2000s GM trucks, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of daily headaches. This isn’t just a part; it’s the central command for your vehicle’s body electronics—controlling everything from your power windows and door locks to the interior lights and security system. A faulty BCM can cause a cascade of issues that are often misdiagnosed, costing you time and money on unnecessary repairs.
This replacement BCM is the definitive solution for your 2002 Sierra 1500 BCM and a wide range of other GM models. We take the biggest hassle out of the repair process: programming. Simply provide us with your vehicle’s VIN after purchase, and our experts will flash the module with the latest GM software specific to your truck. This means no expensive trip to the dealership for programming. It arrives at your door ready for installation, saving you hundreds of dollars and significant downtime.
From the Diagnostic Bay
I remember a 2002 Silverado that came into the shop with a laundry list of complaints. The owner was frustrated because the power locks worked intermittently, the dome light would stay on, and the radio would sometimes shut off on its own. He’d already replaced the driver’s door lock actuator to no avail. After hooking up the scan tool, I noticed several communication codes (U-codes) pointing to a network issue. Instead of just chasing symptoms, we checked the BCM data stream. We found erratic voltage readings and intermittent signal loss. By swapping in a known-good, programmed BCM, every single one of his electrical problems vanished instantly. It’s a classic case of the BCM failing internally, and a reminder that diagnosing the root cause is key.
Is Your Truck Exhibiting These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. Check your vehicle for:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ The security or anti-theft light staying on, preventing the truck from starting.
- ✔ Interior or exterior lights not working correctly (e.g., dome light stays on, headlights flicker).
- ✔ Gauges on the instrument cluster behaving erratically or not working at all.
- ✔ The radio or climate control system randomly shutting off.
- ✔ False warning messages on the driver information center (DIC).
- ✔ Diagnostic Trouble Codes (DTCs) related to lost communication, such as U1000.
Straightforward Installation for Your GM Truck
Installing your new BCM is a manageable job for a DIYer with basic tools. Since we handle the programming, you can focus on the physical swap. Always prioritize safety.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10-15 minutes to allow all modules to power down completely.
- Locate the BCM: On most 2002 GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, often near the steering column. On vans like the Astro/Safari, it’s typically behind the center dash.
- 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 in by a few screws or clips.
- Disconnect and Remove: Carefully disconnect the multiple color-coded electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors firmly, ensuring each one clicks into place.
- Final Steps & Relearns: Reinstall any trim panels you removed and reconnect the negative battery terminal. Start the vehicle. Note that some vehicles may require a ‘Brake Pedal Position Relearn’ or an ‘Airbag System Sync’ with a capable scan tool if a warning light appears, as detailed in our post-install procedures.
Verified Fitment for These GM Models
This module is a direct replacement for several part numbers, including 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It is guaranteed to fit the following vehicles:
- ASTRO (2002-2005)
- AVALANCHE 1500 (2002, 4×2)
- BLAZER S10/JIMMY S15 (2002-2005)
- ESCALADE (2002, 4×2)
- S10/S15/SONOMA (2002-2004)
- SAFARI (GMC) (2002-2005)
- SIERRA 1500 PICKUP (2002)
- SIERRA 2500 PICKUP (2002)
- SIERRA 3500 PICKUP (2002)
- SIERRA DENALI (2002)
- SILVERADO 1500 PICKUP (2002)
- SILVERADO 2500 PICKUP (2002)
- SILVERADO 3500 PICKUP (2002)
- SUBURBAN 1500 / 2500 (2002)
- TAHOE (2002, 4×2)
- YUKON (2002, 4×2)
- YUKON XL 1500 / 2500 (2002)
Frequently Asked Questions
What exactly does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It manages non-engine related functions like power windows, locks, security system, interior lights, wipers, and the instrument cluster.
Do I need to get this BCM programmed?
No. We handle all the programming for you before shipment. Just provide your VIN during checkout, and the module will arrive ready to install with the latest GM software for your specific vehicle.
Where is the BCM located on my 2002 Sierra 1500?
On the 2002 Sierra/Silverado and similar full-size trucks/SUVs, the BCM is typically mounted under the driver’s side dashboard, to the left of the steering column.
What if my airbag light is on after installation?
This is uncommon, but if it happens, it means the new BCM needs to be synced with the airbag system’s SDM. A professional mechanic with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for this part?
No, there is absolutely no core charge. You can keep your old module, so you don’t have to worry about the cost or hassle of shipping it back.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot program and ship your BCM until we receive this information.