If you’re dealing with bizarre electrical problems in your GMC Sierra or related GM truck, 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 flickering interior lights to power windows that have a mind of their own, the BCM is the central hub for your vehicle’s body electronics, and when it fails, chaos ensues.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a quality-tested BCM, service number 9385236, and flash it with the very latest GM-approved software, specifically configured to your truck’s Vehicle Identification Number (VIN). This critical step means you can bypass the expensive and time-consuming trip to the dealership for programming. You get a component that’s ready to work the moment you install it, restoring function and peace of mind.
A Technician’s Notebook: The Case of the Haunted Sierra
I remember a 2000 Sierra 1500 that came into my bay with a list of symptoms that sounded like a ghost story. The radio would switch on and off, the security light would flash randomly (preventing startup), and the power locks would cycle while driving. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a series of communication error codes (U-codes) pointing to a network problem originating from the BCM. This is a classic failure pattern. The internal logic of the original BCM had failed, causing it to flood the data bus with junk information. Installing a properly programmed BCM solved every single issue instantly. This isn’t just a part swap; it’s a diagnostic solution.
Is Your Truck Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution for your 2000 Sierra 1500 BCM problems:
- ✔ 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 on, causing a no-start condition.
- ✔ Instrument cluster gauges behaving erratically or going dead.
- ✔ Horn sounding unexpectedly or not working.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U1000.
Your Straightforward Installation Guide
Installing your new BCM is a manageable job for a confident DIYer. While the exact location can vary slightly, it’s typically found under the driver’s side of the dashboard.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the BCM: On most 2000-era GM trucks, the BCM is a black plastic box located to the left of the steering column, often attached to a metal bracket.
- Disconnect the Connectors: Carefully release the locking tabs on the multiple wiring harness connectors and pull them straight out from the module. Do not force them.
- Remove the Old Module: Unbolt or unclip the old BCM from its mounting bracket and remove it from the vehicle.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely re-attach the wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, windows, locks, etc.—to confirm the repair.
What to Expect After Installation
Because this module is pre-programmed, most functions will work immediately. However, in some vehicles, additional synchronization steps may be needed:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn might be necessary for proper brake light and traction control operation.
We handle the programming, so there’s no core charge! You can keep your old module.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for modules with service numbers 19208539, 9371990, or 9385236. It is confirmed to fit the following vehicles:
- ASTRO 01: Body Control (BCM); (LH dash)
- BLAZER S10/JIMMY S15 01: Body Control (BCM); (center dash), ID 9385236
- BRAVADA 01: Body Control (BCM); (center dash)
- S10/S15/SONOMA 01: Body Control (BCM); (center dash)
- SAFARI (GMC) 01: Body Control (BCM); (LH dash)
- SIERRA 1500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236 or 9371990
- SIERRA 2500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236
- SILVERADO 1500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236 or 9371990
- SILVERADO 2500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236
- SUBURBAN 1500/2500 00: Body Control (BCM); (LH dash), ID 9385236
- TAHOE 00: Body Control (BCM); (LH dash), ID 9385236
- YUKON 00: Body Control (BCM); exc. Denali; (LH dash), ID 9385236
- YUKON XL 1500/2500 00: Body Control (BCM); (LH dash), ID 9385236
Frequently Asked Questions About This BCM
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your 17-digit VIN. We will program the module with the latest GM software matched to your vehicle before we ship it out.
Is this a difficult part to install myself?
For most DIYers with basic tools, this is a straightforward installation. The module is typically located under the driver’s side dashboard and held in by a few bolts or clips. The main challenge is usually accessing it, not the replacement itself.
Do I need to send my old BCM back?
No, there is absolutely no core charge for this item. You can keep your old module, which can be helpful if you ever need to reference it.
What tools are needed for the post-installation procedures?
The ‘Airbag System Sync’ and ‘Brake Pedal Position Relearn’ procedures require a high-level, bi-directional diagnostic scan tool, like a Tech 2 or equivalent professional-grade scanner. Basic code readers cannot perform these functions. However, these procedures are not always required.
Will this fix my ‘Service 4WD’ light?
While the BCM communicates with many systems, issues with the four-wheel-drive system are more commonly related to the Transfer Case Control Module (TCCM) or the dash-mounted switch. A proper diagnosis is recommended to pinpoint the exact cause.