Are you chasing electrical gremlins in your GM truck or SUV? Intermittent power windows, a flickering dash, or a security light that won’t turn off can be incredibly frustrating. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing problems. Stop throwing parts at the issue and get the definitive fix with our pre-programmed 1999-2000 GM BCM.
Forget the expensive trip to the dealership and their high programming fees. We take the hassle out of the repair. Simply provide your vehicle’s VIN at checkout, and our technicians will flash this module with the latest GM software specific to your truck. It arrives at your door ready for a straightforward installation, saving you time, money, and headaches. This is a direct-fit replacement for part number 8162571250 and several others, ensuring you get the right component the first time.
Case Study: A Tricky Diagnosis
I remember a 2000 Silverado 1500 that came into my shop with the strangest collection of symptoms. The owner said his radio would turn on by itself, the dome light would stay on for minutes after closing the door, and sometimes the power locks wouldn’t respond. He’d already replaced the battery and checked all the fuses. We hooked up the scan tool and saw a few intermittent communication codes (U-codes). Instead of a specific component failure, the data pointed to the central processor—the BCM. After installing a pre-programmed BCM like this one, every single electrical issue vanished. It’s a common failure point I’ve seen fix dozens of seemingly unrelated problems.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is likely the solution you need:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior lights or dashboard lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, potentially causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Communication error codes (like U0140) stored in the system.
- ✔ Wipers operating intermittently or not parking in the correct position.
A Straightforward Guide to Installation
With our pre-programmed module, you can get this job done right in your own driveway. While the exact location varies slightly by model (see fitment list), the process is generally the same.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most S10/Blazer models, it’s behind the center dash/glove box. On Silverado/Sierra and Astro/Safari models, it’s typically located on the driver’s side, under the dash near the steering column.
- Remove Connectors: Carefully unplug the wiring harnesses connected to the old BCM. They have locking tabs that need to be depressed. Do not force them.
- Swap the Module: Unbolt or unclip the old BCM and remove it. Mount your new, pre-programmed BCM in its place.
- Reconnect Everything: Plug the wiring harnesses firmly into the new module until they click. Reconnect your battery terminal.
- Cycle the Ignition: Turn the key to the ‘ON’ position (without starting the engine) for 10-15 seconds to allow the systems to initialize before starting the vehicle.
Important Post-Installation Steps
Because this 1999-2000 GM BCM is new and programmed to your VIN, some related systems may require a ‘handshake’ procedure to recognize it. These do not always occur but are important to be aware of:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag module (SDM) with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure brake lights and traction control function correctly.
Disclaimer: We always recommend consulting a factory service manual for procedures specific to your exact vehicle.
Will This Fit My Vehicle?
This BCM is a guaranteed fit for the following vehicles, matching part ID 16257125 where noted. It also replaces part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 8191536250, and 09366801.
- Chevrolet S10 / GMC Sonoma: 1998-2000 (Center Dash)
- Chevrolet Blazer / GMC Jimmy S15: 1998-2000 (Center Dash)
- Oldsmobile Bravada: 1998 (Center Dash, w/ opt ZN4)
- Chevrolet Silverado 1500 / 2500: 1999-2000 (LH Dash)
- GMC Sierra 1500 / 2500: 1999-2000 (LH Dash)
- Chevrolet Astro / GMC Safari: 2000 (LH Dash)
- Isuzu Hombre: 1999-2000 (LH Dash)
Frequently Asked Questions
Do I have to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Is this part difficult to install for a DIYer?
Because we program the module to your VIN before shipping, the physical installation is straightforward for someone with basic mechanical skills. The most critical part is ensuring the correct post-installation procedures are performed if needed.
What does ‘programmed to your VIN’ mean?
It means we load the specific software and settings for your vehicle’s options (like power windows, keyless entry, etc.) onto the BCM. This makes it a plug-and-play part, avoiding a mandatory and costly programming service at a dealership.
What happens if I don’t provide my VIN?
We cannot ship the BCM without your vehicle’s 17-digit VIN. The programming is essential for the module to function correctly in your truck. We will contact you after your purchase to get this information.
Will this 1999-2000 GM BCM fix my no-start problem?
If your no-start issue is caused by the factory anti-theft system (Passlock) being triggered by a faulty BCM, then yes, this part will resolve the problem. A lit ‘Security’ light on the dash is a strong indicator.