Is Your GM Truck’s Electrical System Acting Possessed?
If you’re dealing with flickering lights, malfunctioning power windows, or a security system with a mind of its own, the culprit is often a failing Body Control Module (BCM). The BCM acts as the central nervous system for your truck’s body electronics, coordinating everything from the dome light to the door locks. When it starts to fail, it can cause a cascade of frustrating and seemingly unrelated electrical issues that are notoriously difficult to diagnose.
Signs Your BCM Needs Replacement
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights staying on, not turning on, or flickering.
- ✔ The security or anti-theft system preventing the truck from starting or sounding false alarms.
- ✔ Horn honking randomly or failing to work when needed.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Wipers behaving erratically (e.g., not parking in the correct position).
The Direct-Fit Solution: A VIN-Programmed 1999-2000 GM Truck BCM
Don’t let a faulty module keep your truck off the road. This replacement Body Control Module is the definitive solution to restore your vehicle’s electronic functions. We eliminate the biggest hassle of BCM replacement: the need for expensive dealership programming. Simply provide us with your vehicle’s 17-digit VIN during checkout, and we will flash the module with the latest official GM software specific to your truck. It arrives at your door ready for installation. This is the most efficient way to get your Silverado, Sierra, S10, or Blazer working correctly again. Plus, there is absolutely no core charge—you can keep your old part.
From the Diagnostic Bay
We had a ’99 Silverado in the shop where the dome light would randomly come on, draining the battery overnight. The owner had replaced the battery twice and all the door jamb switches. After hours of tracing wires, we found no shorts. The culprit was an internal fault in the BCM that was sending a phantom ‘door open’ signal. Swapping in a pre-programmed 1999-2000 GM Truck BCM fixed the parasitic drain instantly. It’s often the central component you least suspect causing the most bizarre problems.
Installation and Required Procedures
Physically replacing the BCM is a straightforward process for a DIY mechanic or any professional technician. The module is typically located behind the dashboard on the driver’s side or in the center console area. While our VIN programming makes this a plug-and-play repair, some vehicle systems may require a simple synchronization procedure after the new module is installed.
Post-Installation Syncing
Airbag System Sync: If the airbag warning light comes on after installation, the ‘Setup SDM Primary Key in BCM’ procedure will need to be performed with a professional diagnostic tool to sync the system and turn off the light. This is only required if the airbag warning light is on post-installation.
Brake Pedal Position Relearn: A brake pedal position sensor recalibration may be necessary to ensure proper brake light function and traction control system performance. This procedure may be required depending on your specific model.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Confirmed Vehicle Fitment
This module is a direct replacement for part numbers 16257125, 09366801, 19153625, 8191536250, 191583625, 8093668010, 8162571250, and 8191536250 on the following vehicles:
- 1998-2000 S10/S15/SONOMA (center dash)
- 1998-2000 BLAZER S10/JIMMY S15 (center dash)
- 1998 BRAVADA (center dash, w/extended build date opt ZN4)
- 1999-2000 ISUZU HOMBRE (LH dash)
- 1999-2000 SIERRA 1500 PICKUP (LH dash)
- 1999-2000 SILVERADO 1500 PICKUP (LH dash)
- 1999-2000 SIERRA 2500 PICKUP (LH dash)
- 1999-2000 SILVERADO 2500 PICKUP (LH dash)
- 2000 ASTRO (LH dash)
- 2000 SAFARI (GMC) (LH dash)
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that manages and controls your truck’s non-engine-related electronic systems. This includes power windows, door locks, interior and exterior lighting, the security system, wipers, and more.
Is this BCM truly ‘plug and play’?
Yes, this module comes pre-programmed to your vehicle’s specific VIN. This means it’s ready for installation right out of the box without needing a trip to the dealership for expensive programming. However, as noted, some vehicles may require a simple relearn procedure for the airbag or brake systems after installation.
How do I provide my VIN for programming?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). We will program the BCM with the latest GM software matched to your VIN before we ship it to you.
What happens if the airbag light comes on after I install it?
This indicates the new BCM needs to be synced with the vehicle’s Sensing and Diagnostic Module (SDM). A qualified technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this and turn off the light.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.