If you’re dealing with bizarre electrical gremlins in your 2000 GMC Sierra 1500, 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 constant frustration. From power windows with a mind of their own to a security light that won’t let you start the engine, the BCM is often the culprit. This isn’t just a part; it’s the solution to getting your truck’s essential functions back in order.
This isn’t a generic, off-the-shelf component. We provide a fully programmed Body Control Module specific to your truck. Simply provide us with your vehicle’s VIN (Vehicle Identification Number) after your purchase, and our experts will flash the module with the latest GM software updates. This critical step ensures seamless communication between the BCM and your truck’s other systems, saving you a costly trip to the dealership for programming. This is the most direct path to a reliable repair for your 2000 Sierra 1500 BCM.
A Technician’s Notebook: The Case of the Flashing Security Light
A customer brought in his 2000 Silverado—a sister truck to the Sierra—with an intermittent no-start condition. The security light was flashing, and the power locks were acting up. He’d already replaced the battery and checked the ignition switch. After connecting my scan tool, I saw several communication loss codes pointing toward the BCM. Instead of a complex wiring issue, the BCM’s internal logic had failed. We installed a VIN-programmed BCM just like this one, and the truck fired right up, with all body functions restored. This is a classic failure I’ve diagnosed hundreds of times on these GM platforms.
Common Signs of a Failing BCM
If your truck is experiencing any of these issues, a faulty Body Control Module is a likely cause. A failing 2000 Sierra 1500 BCM can create a wide range of confusing symptoms:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights staying on or not working at all.
- ✔ The security or anti-theft light flashing, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers operating intermittently or not parking in the correct position.
- ✔ Inaccurate fuel gauge or other instrument cluster readings.
- ✔ Communication DTCs (Diagnostic Trouble Codes) like U1000 or other ‘U’ codes stored in other modules.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. It’s typically located under the driver’s side of the dashboard. Follow these general steps for a successful installation:
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Locate the BCM: On most 2000 Sierra models, you’ll find the BCM mounted to the left of the steering column, often behind a lower dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. 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. Securely plug in all the electrical connectors, ensuring they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Post-Install Checks: Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc. Note that some additional system relearns may be necessary (see below).
Important Post-Installation Procedures
Because this 2000 Sierra 1500 BCM is central to many systems, a couple of additional steps might be needed after installation:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This syncs the new BCM with the airbag system and must be done with a professional-grade diagnostic tool.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure correct brake light and traction control operation.
Verified Vehicle Compatibility
This module is a direct-fit replacement for several GM vehicles, matching service numbers 19208539, 9371990, and 9385236. Please verify your original part number or consult the list below:
BLAZER S10/JIMMY S15 01 (center dash), ID 9385236
BRAVADA 01 (center dash)
S10/S15/SONOMA 01 (center dash)
SAFARI (GMC) 01 (LH dash)
SIERRA 1500/2500 PICKUP 00 (LH dash), ID 9371990 or 9385236
SILVERADO 1500/2500 PICKUP 00 (LH dash), ID 9371990 or 9385236
SUBURBAN 1500/2500 00 (LH dash), ID 9385236
TAHOE 00 (LH dash), ID 9385236
YUKON 00 (exc. Denali, LH dash), ID 9385236
YUKON XL 1500/2500 00 (LH dash), ID 9385236
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
What does ‘VIN Programmed’ mean?
It means we load your truck’s specific Vehicle Identification Number (VIN) and factory software onto the module before shipping. This makes the installation process much simpler and avoids a trip to the dealer for programming.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. Programming is essential for the part to function correctly in your vehicle. We will contact you after your purchase to get this information.
Will this fix my truck’s no-start problem?
If the no-start is caused by the security system, which is controlled by the BCM, then yes, this is very likely the solution. A flashing security light is a strong indicator of a BCM-related issue.
Do I need special tools for the airbag or brake relearn procedures?
Yes, these procedures typically require a bi-directional scan tool that can perform specific manufacturer functions. Many local repair shops can perform these relearns for you if needed.