If you’re dealing with bizarre electrical issues in your 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. This isn’t just a part; it’s the central command for your vehicle’s body electronics, and when it goes bad, the symptoms can be maddening. This module is the definitive, reliable solution you’ve been searching for.
We take the biggest headache out of the repair process: programming. Before this module ever leaves our facility, we flash it with the latest GM software updates, specifically coded to your vehicle’s VIN. This means you get a part that’s ready to install right out of the box, saving you a costly trip to the dealership and their programming fees. Simply provide your VIN at checkout, and we handle the rest.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or interior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Wipers or radio turning on and off by themselves.
- ✔ False warning messages on the instrument cluster (e.g., ‘Service 4WD’).
- ✔ Diagnostic trouble codes (DTCs) related to communication loss with other modules (U-codes).
- ✔ Inconsistent operation of the keyless entry system.
Case Study: The Ghost in the Dashboard
I remember a 2000 Sierra 1500 that came into my shop with a list of problems that seemed unrelated. The owner said his radio would change stations on its own, the dome light would flicker, and sometimes the truck wouldn’t start, showing a security light. He’d already replaced the battery and checked all the grounds. After connecting my scan tool, I saw multiple communication loss codes with the BCM. Instead of chasing electrical gremlins for hours, we installed a VIN-programmed BCM. The truck was back to normal in under an hour. This is a classic failure pattern for these modules.
A Straightforward Guide to BCM Installation
Replacing the 2000 Sierra 1500 BCM is a manageable job for a confident DIYer. It’s typically located under the driver’s side of the dashboard.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On most of these trucks, it’s mounted to a bracket to the left of the steering column. You may need to remove the lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed BCM into place and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock in.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc. Note the important post-installation procedures below.
Important Post-Installation Information
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 which may require a professional-grade scan tool:
- Airbag System Sync: If your airbag warning light is on after installation, a procedure called ‘Setup SDM Primary Key in BCM’ is needed to sync the airbag system. This is only required if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified technician if you are unsure about any step. No core charge is required; you can keep your old module.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 19208539, 9371990, and 9385236. It fits the following models:
- 2000 Chevrolet Silverado 1500/2500 Pickup
- 2000 GMC Sierra 1500/2500 Pickup
- 2000 Chevrolet Tahoe
- 2000 Chevrolet Suburban 1500/2500
- 2000 GMC Yukon & Yukon XL 1500/2500 (exc. Denali)
- 2001 Chevrolet S10 / GMC Sonoma
- 2001 Chevrolet Blazer / GMC Jimmy
- 2001 Oldsmobile Bravada
- 2001 Chevrolet Astro / GMC Safari
Frequently Asked Questions about the 2000 Sierra 1500 BCM
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We handle all the programming for you before we ship. Just provide us with your vehicle’s 17-digit VIN during or after checkout, and it will arrive ready to install.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. You can find it on a plate on the driver’s side dashboard (viewable through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Is this part difficult to install?
For someone with basic mechanical skills, it’s a straightforward process. The main challenge is accessing the module under the dashboard. No special tools are typically required for the removal and replacement itself.
What if my airbag light comes on after I install it?
This is a possibility. The new BCM needs to be electronically introduced to the airbag’s computer (SDM). This requires a ‘Setup SDM Primary Key’ procedure using a bi-directional scan tool, which most professional repair shops can perform.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.