Are you battling frustrating and unpredictable electrical problems in your GM truck, van, or SUV? One minute the power windows work, the next they don’t. The security light is flashing, preventing your vehicle from starting. Or maybe the gauges are sweeping wildly for no reason. As a technician with over two decades of diagnostic experience, I’ve seen these exact issues hundreds of time, and they almost always point to one component: a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. When it starts to fail, it can create a cascade of baffling problems that seem unrelated. This isn’t just an inconvenience; it can affect your vehicle’s security and your safety. This is the definitive solution to restore your vehicle’s proper function. We offer a reliable replacement 2002-2005 GM BCM, part number 19208537, that arrives at your door pre-programmed with the latest GM software specifically for your vehicle. Simply provide your VIN during checkout, and we handle the complex programming. This means no expensive trip to the dealership for flashing, saving you time and hundreds of dollars.
Case Study: A Tricky Diagnosis
I remember a 2002 Silverado 2500 that came into the shop with an intermittent no-start and a flickering security light. The owner had already replaced the battery and ignition switch, but the problem persisted. A quick scan showed a U-series communication code, a classic sign of module failure. Instead of spending hours tracing wires, we swapped in a VIN-programmed BCM. The truck started on the first try, and all the strange electrical gremlins were gone. This part saved the customer from more guesswork and got his work truck back on the road the same day.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Intermittent or non-working power windows, door locks, or interior lights.
- ✔ The security or anti-theft light is on or flashing, causing a no-start condition.
- ✔ Gauges on the instrument cluster behaving erratically or not working at all.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ HVAC (heater and A/C) controls are unresponsive.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or B1001.
A Straightforward Guide to Installation
Replacing the BCM is a job most DIYers can handle with basic tools. Our pre-programmed module makes it a simple swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On these GM models, the BCM is typically found in one of two places: under the driver’s side of the dashboard near the steering column, or behind the center dash panel. A quick search for your specific model will confirm the location.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Firmly plug in all the electrical connectors until they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, etc.—to confirm the repair.
Important Post-Installation Notes
In some cases, additional steps may be required after installation:
- ✔ Airbag System Sync: If your airbag warning light illuminates after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- ✔ Brake Pedal Position Relearn: Certain models may require a brake pedal position sensor relearn to ensure correct brake light and traction control operation.
Disclaimer: Procedures can vary. Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
Verified Vehicle Compatibility
This 2002-2005 GM BCM is a direct replacement for part numbers 15063578, 15081796, 15095334, 19208537, DKAK, and DPNU. It fits a wide range of vehicles, including:
- Cadillac Escalade (2002)
- Chevrolet Astro Van (2002-2005)
- Chevrolet Avalanche 1500 (2002)
- Chevrolet Blazer S10 (2002-2005)
- Chevrolet S10 Pickup (2002-2004)
- Chevrolet Silverado 1500, 2500, 3500 (2002)
- Chevrolet Suburban 1500, 2500 (2002)
- Chevrolet Tahoe (2002)
- GMC Jimmy S15 (2002-2005)
- GMC Safari Van (2002-2005)
- GMC Sierra 1500, 2500, 3500, Denali (2002)
- GMC Sonoma S15 (2002-2004)
- GMC Yukon & Yukon XL 1500, 2500 (2002)
Note: Please verify your original part number or consult the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and vehicle-specific options your truck or SUV was built with. This ensures seamless integration and proper function without a trip to the dealer.
Is this part difficult to install?
No, for most people with basic hand tools, this is a straightforward job. Since we pre-program the module, the physical replacement is the only step. See our installation guide above for the general process.
Will this fix my ‘Security’ light issue?
Yes, a flashing security light and a no-start condition are hallmark symptoms of a failed BCM. This replacement, programmed to your VIN, is designed to resolve that specific issue by restoring communication with your vehicle’s anti-theft system.
What if my airbag light comes on after I install it?
This is uncommon but can happen. It simply means the new BCM needs to be electronically ‘introduced’ to the airbag module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.
Is there a core charge?
No, there is absolutely no core charge for this part. You can keep your old module, so there’s no need to worry about return shipping.