Are you chasing electrical gremlins in your GM truck or SUV? One minute the dome light works, the next it doesn’t. Your power locks have a mind of their own, and a mysterious battery drain leaves you stranded. Before you spend another frustrating weekend tracing wires, the problem is likely the central hub of your vehicle’s electronics: the Body Control Module (BCM). This isn’t just a part; it’s the solution to restoring order and reliability to your vehicle’s essential functions.
We take the guesswork and dealership hassle out of the equation. This BCM, part number 9366801, arrives at your door fully programmed to your vehicle’s specific VIN. We load it with the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This simple, direct replacement gets your truck back to factory-spec operation without the need for expensive dealer-only programming tools.
Case Study: A Tricky Diagnosis
A customer brought in his ’99 Silverado 1500 with a classic BCM failure story. The radio would randomly shut off, the power windows would stop working for days at a time, and the security light was always on, causing an intermittent no-start. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a handful of U-codes (communication errors) pointing to a network issue. In my experience, these symptoms almost always lead back to a failing BCM. We installed one of our VIN-programmed modules, and within 30 minutes, all the phantom electrical issues were gone. It’s a common failure, but with the right part, it’s a straightforward fix.
Is Your Truck Showing These Symptoms?
A failing BCM can cause a wide range of confusing issues. Here are the most common signs that it’s time for a replacement:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft system light is illuminated, preventing the engine from starting.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ The radio or infotainment system randomly turns on or off.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss (U-codes) or body systems (B-codes).
- ✔ Unexplained battery drain that kills your battery overnight.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a confident DIYer. While the exact location varies, the process is similar across models. Always consult a service manual for your specific vehicle.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On models like the S10/Blazer, it’s typically behind the center dash. For full-size trucks (Silverado/Sierra) and vans (Astro/Safari), it’s usually on the driver’s side, under the dashboard.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module. Keep track of your screws.
- Unplug and Unbolt: Disconnect the electrical connectors from the old BCM. They have locking tabs, so be gentle. Then, unbolt the module from its mounting bracket.
- Install the New BCM: Bolt the new, pre-programmed BCM into place and securely reconnect all electrical connectors.
- Reassemble and Reconnect: Put the trim panels back in place and reconnect the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Steps
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is on 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: On some models, a brake pedal position sensor recalibration may be necessary to ensure brake lights and traction control work correctly.
Disclaimer: Specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for the following vehicles, matching part numbers 16257125, 19153625, 09366801, and others listed in the product details. Please match your part number or vehicle to ensure correct fitment.
- Astro Van: 2000 (LH dash)
- Blazer S10 / Jimmy S15: 1998-2000 (center dash)
- Bravada: 1998 (center dash, w/ opt ZN4)
- Isuzu Hombre: 1999-2000 (LH dash)
- S10 / S15 / Sonoma Pickup: 1998-2000 (center dash)
- Safari (GMC): 2000 (LH dash)
- Sierra 1500/2500 Pickup: 1999-2000 (LH dash)
- Silverado 1500/2500 Pickup: 1999-2000 (LH dash)
Frequently Asked Questions
Do I need to get this programmed by a dealer?
No. We handle all the programming for you before we ship the part. Simply provide your vehicle’s 17-digit VIN during checkout, and it will arrive ready for installation.
What if my airbag light comes on after I install it?
This is a possibility. It means the new BCM needs to be electronically introduced to the airbag module (SDM). This requires a ‘Setup SDM Primary Key’ procedure, which can be done by a repair shop with a professional-grade diagnostic tool.
Is this part difficult to install myself?
For most DIYers with basic tools, this is a very manageable repair. The main challenge is accessing the module, which is usually under the dashboard. Our installation guide provides the general steps.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
How do I find my part number?
The part number is printed on a sticker on your original BCM. You will need to access the module to read it. This part replaces several numbers, including 16257125 and 09366801.