Restore Control and Eliminate Electrical Frustrations
Are you chasing down bizarre electrical gremlins in your GMC Sierra or Chevrolet Silverado? One minute the power windows work, the next they don’t. The security light flashes, preventing your truck from starting. These aren’t random glitches; they’re classic signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause widespread and frustrating issues. This is the definitive solution to restore your vehicle’s functionality and your peace of mind. We provide a reliable, fully tested BCM that is programmed specifically to your truck’s VIN with the latest GM software updates before it ships. This eliminates the need for an expensive trip to the dealership for programming.
A Technician’s Notebook
I remember a 2000 Sierra 1500 that came into my bay with a list of complaints that seemed unrelated. The owner said his interior lights would flicker, the radio would cut out, and sometimes the truck wouldn’t start—the security light would just blink. He’d already replaced the battery and checked the alternator. After hooking up the scan tool, I saw a handful of ‘U’ codes, indicating communication loss between modules. The common link? The BCM. Water intrusion from a leaky windshield seal had corroded the BCM’s internal board. Swapping in a VIN-programmed module like this one resolved all the issues in one shot. It’s a fix I’ve performed hundreds of times on these GM trucks; the BCM is the root of so many of these electrical headaches.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the likely solution for your 1999-2000 Sierra 1500 BCM problems:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior.
- ✔ A flashing security light on the dash and a no-start condition.
- ✔ Gauges on the instrument cluster behaving erratically or not working at all.
- ✔ Diagnostic trouble codes (DTCs) related to lost communication, such as U0140.
- ✔ Horn or alarm system randomly activating.
Your Straightforward Installation Guide
Installing your new BCM is a manageable job for a DIYer with basic tools. Here’s a general guide for a 1999-2000 Sierra 1500:
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before starting work.
- Locate the BCM: On most 1999-2000 Sierra and Silverado models, the BCM is located on the driver’s side, up under the dashboard to the left of the steering column.
- Remove Trim Panels: You may need to remove the lower dash knee bolster panel to gain clear access to the module.
- 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: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical connectors.
- Reconnect and Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—lights, locks, windows, etc.
Post-Installation Procedures: What to Expect
Because this 1999-2000 Sierra 1500 BCM is pre-programmed, the most complex step is already done for you. However, depending on your vehicle’s specific configuration, a couple of simple relearn procedures may be necessary:
- Airbag System Sync: In some cases, the new BCM may need to be synced with the airbag’s SDM (Sensing and Diagnostic Module). 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 is only needed if the light appears.
- Brake Pedal Position Relearn: To ensure correct brake light operation and ABS/traction control function, a brake pedal position sensor relearn might be required. This can often be done with a capable bidirectional scan tool.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Will This Fit My Vehicle?
This BCM is a direct-fit replacement for a wide range of GM vehicles and is guaranteed to be compatible if your original part number is listed. We program it to your specific VIN for seamless integration.
- Part Numbers: 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 09366801
- Compatible Models:
- ASTRO 00 Body Control (BCM); (LH dash)
- BLAZER S10/JIMMY S15 98-00 Body Control (BCM); (center dash), ID 16257125
- BRAVADA 98 Body Control (BCM); (center dash), w/extended build date (opt ZN4)
- ISUZU HOMBRE 99-00 Body Control (BCM); (LH dash)
- S10/S15/SONOMA 98-00 Body Control (BCM); (center dash), ID 16257125
- SAFARI (GMC) 00 Body Control (BCM); (LH dash)
- SIERRA 1500 PICKUP 99-00 Body Control (BCM); (LH dash)
- SIERRA 2500 PICKUP 99-00 Body Control (BCM); (LH dash)
- SILVERADO 1500 PICKUP 99-00 Body Control (BCM); (LH dash)
- SILVERADO 2500 PICKUP 99-00 Body Control (BCM); (LH dash)
Best of all, there is absolutely no core charge. You can keep your old module.
Frequently Asked Questions
Why do I need to provide my VIN?
Your VIN is essential. We use it to program the BCM with the correct software and vehicle-specific options (like power windows, keyless entry, etc.) directly from GM’s database. This ensures the module works correctly right out of the box.
Is this a plug-and-play part?
Yes, for the most part. Because we pre-program it to your VIN, you will not need a dealership to program the main functions. However, as noted above, some vehicles may require a simple relearn procedure for the airbag or brake pedal position sensor after installation.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the central hub for your vehicle’s body electronics. It controls functions like power windows, locks, interior/exterior lights, the alarm system, wipers, and communicates with other modules in your truck.
Will this fix my truck’s no-start problem?
If your no-start issue is caused by the factory anti-theft system (Passlock) and you see a flashing ‘Security’ light, a faulty BCM is a very common cause. This programmed module is designed to resolve that specific problem.
Do I need to send my old BCM back?
No. This purchase requires no core charge. You can keep your original part, which simplifies the process and gets your truck back on the road faster.