If you’re dealing with baffling electrical issues in your late 90s or early 2000s GM truck or SUV, 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 vehicle into a source of constant frustration. Flickering lights, malfunctioning power windows, a security system that acts up, or a battery that mysteriously drains overnight are all classic signs. This isn’t just an inconvenience; it can affect your vehicle’s safety and reliability.
This is a direct-fit replacement Body Control Module, part number 09366801, for a wide range of GM vehicles. The biggest hurdle with BCM replacement has always been the expensive and time-consuming trip to the dealership for programming. We eliminate that step. By providing us with your vehicle’s VIN at checkout, we will program the module with the latest GM software updates specifically for your truck or SUV. It arrives at your door ready for installation, saving you time, money, and hassle.
From the Diagnostic Bay: The Silverado with a Mind of Its Own
A customer brought in his ’99 Silverado 1500 with a strange complaint: the interior dome lights wouldn’t turn off, ever. He’d been disconnecting his battery every night to keep it from dying. He had already replaced the door jamb switches, thinking that was the obvious culprit, but the problem persisted. When we hooked up the scan tool, we saw no codes, but live data showed the BCM was receiving a constant ‘door ajar’ signal, even with all doors securely shut. This is a common failure I’ve seen dozens of times; internal corrosion or a failed driver circuit inside the BCM creates a phantom signal. We installed a pre-programmed BCM, and the issue was resolved instantly. It’s a perfect example of how a single module can cause such a perplexing issue.
Is Your GM Truck or SUV Showing These BCM Failure Signs?
A faulty BCM can manifest in numerous ways. If you’re noticing any of the following, it’s a strong indicator that your BCM may need replacement. This isn’t just a part; it’s the solution to restoring your vehicle’s core functions.
- ✔ Erratic or non-functional power windows and door locks.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft light is on, preventing the engine from starting.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ The radio or other accessories work intermittently.
- ✔ Communication issues with other modules, which may trigger codes like U0140 (Lost Communication With Body Control Module).
- ✔ Unexplained parasitic battery drain that kills your battery overnight.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a DIYer with basic tools. Our pre-programmed module makes the process much simpler. Follow these general steps to get your vehicle back in order.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most of these models (Silverado, Sierra, S10, etc.), the BCM is located in the dashboard, often to the left of the steering column or in the center dash area. You may need to remove a lower dash panel for access.
- 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 module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all related functions: power windows, locks, lights, and gauges. Start the vehicle.
- Perform Relearns (If Necessary): As noted below, some vehicles may require a ‘Setup SDM Primary Key’ or ‘Brake Pedal Position Relearn’ if you see an airbag light or have brake system issues. This requires a professional-grade scan tool.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 09366801 and is interchangeable with part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, and 8162571250. It is confirmed to fit the following vehicles:
- ✔ 1998-2000 Chevrolet S10 / GMC Sonoma (center dash)
- ✔ 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15 (center dash)
- ✔ 1999-2000 Chevrolet Silverado 1500 / 2500 (LH dash)
- ✔ 1999-2000 GMC Sierra 1500 / 2500 (LH dash)
- ✔ 2000 Chevrolet Astro / GMC Safari (LH dash)
- ✔ 1999-2000 Isuzu Hombre (LH dash)
- ✔ 1998 Oldsmobile Bravada (center dash, w/ extended build date opt ZN4)
Note: This is a reliable solution for your 1999-2000 GM BCM replacement needs. Always match your original part number or use the fitment list to confirm compatibility.
Important Post-Installation Information
While our programming handles the majority of the setup, GM’s complex systems sometimes require additional synchronization after installation. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible diagnostic tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be needed to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any part of the process.
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this module. You can keep your original part.
How do I provide my VIN for programming?
Simply enter your 17-digit VIN in the designated box on the checkout page. We cannot ship your order until we have the VIN to program the module correctly for your vehicle.
Is this a plug-and-play part?
For most vehicles, yes. Because we pre-program it to your VIN, it eliminates the need for dealer programming. However, as mentioned, some vehicles may require an additional relearn procedure for the airbag or brake systems if warning lights appear after installation.
What happens if the airbag light comes on after I install it?
This means the new BCM needs to be electronically ‘introduced’ to your vehicle’s airbag module (SDM). A repair shop with a professional-grade scan tool (like a Snap-on Solus, Autel MaxiSYS, or GM Tech 2) can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix my no-start security issue?
In many cases, yes. A failing BCM is a very common cause of an active anti-theft system that prevents the engine from starting. Replacing it with a properly programmed module often resolves this issue. Our programming for your 1999-2000 GM BCM includes the necessary security information.