Is Your GM Truck Experiencing Electrical Gremlins?
Are you dealing with bizarre and frustrating electrical issues in your 1998-2000 Chevrolet S10, GMC Sonoma, Blazer, or another compatible GM truck? Do your headlights flicker for no reason? Do the power locks have a mind of their own? Perhaps the security system triggers randomly, or the wipers won’t turn off. These aren’t just annoyances; they are classic symptoms of a failing Body Control Module (BCM).
The BCM is the central nervous system for your vehicle’s body electronics. It doesn’t control the engine—that’s the job of the ECM/PCM—but it manages a huge range of comfort, convenience, and security features. When it starts to fail, it can create a cascade of unpredictable problems that are often difficult to diagnose. A faulty BCM can make your reliable truck feel haunted, with systems acting erratically and without warning.
Common Symptoms of a Failing BCM
- ✔ Erratic interior or exterior lights (flickering, staying on, or not working at all).
- ✔ Power windows, door locks, or mirrors operating intermittently or refusing to work.
- ✔ Security system malfunctions, including false alarms or the inability to arm or disarm the system.
- ✔ The horn honking unexpectedly or failing to work when needed.
- ✔ Windshield wipers activating on their own, operating at the wrong speed, or not parking correctly.
- ✔ Instrument cluster warning lights, particularly the airbag light, illuminating without a valid reason.
- ✔ Inconsistent operation of the radio or climate control systems.
- ✔ A parasitic battery drain that leaves you with a dead battery overnight.
The Plug-and-Play Solution for Your 1998-2000 S10 BCM
Replacing a faulty BCM used to mean a trip to the dealership for expensive parts and programming fees. This module eliminates that hassle. We provide a fully tested Body Control Module that is pre-programmed specifically for your vehicle. When you place your order, you provide us with your truck’s Vehicle Identification Number (VIN). Our technicians then flash the module with the latest, most stable software updates directly from GM, ensuring it matches your vehicle’s exact configuration and options. This process makes installation straightforward, restoring your truck’s electrical systems to perfect working order without the need for additional programming tools.
Easy Installation and Post-Install Notes
This module is designed for a direct fit. On S10, Sonoma, Blazer, and Jimmy models, it’s typically located behind the center of the dashboard. On full-size trucks like the Silverado and Sierra, it’s often found on the driver’s side (LH) dash area. While the installation is plug-and-play, a couple of post-installation procedures, known as ‘relearns,’ may be necessary depending on your specific vehicle.
- Airbag System Sync: If the airbag warning light is on after installation, it means the new BCM needs to be synced with the airbag’s computer (SDM). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a quick step for any qualified technician.
- Brake Pedal Position Relearn: In some cases, the brake pedal position sensor may need to be recalibrated to ensure proper brake light function and traction control system operation.
Best of all, there is no core charge for this part. You can keep your old module without the hassle of shipping it back.
Guaranteed Fitment
This BCM, part number 16257125, is a direct replacement for several part numbers, including 19153625, 8191536250, 09366801, and more. It is guaranteed to fit the following vehicles:
- 1998-2000 Chevrolet S10 / GMC S15/Sonoma
- 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15
- 1998 Oldsmobile Bravada (w/ extended build date opt ZN4)
- 1999-2000 Isuzu Hombre
- 1999-2000 Chevrolet Silverado 1500/2500
- 1999-2000 GMC Sierra 1500/2500
- 2000 Chevrolet Astro
- 2000 GMC Safari
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready to install with the latest GM software.
What is a VIN and where do I find it?
The VIN is your 17-digit Vehicle Identification Number. You can find it on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What happens if my airbag light comes on after installation?
This is a common security measure. The new BCM needs to be synchronized with the airbag control module (SDM). A technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Is this a difficult part to replace myself?
For someone with moderate DIY mechanical skill, it is a manageable job. The BCM is usually located behind the dashboard and may require removing some trim panels for access. We always recommend consulting a factory service manual for your specific vehicle.
Will this fix my ‘Check Engine’ light?
No. The BCM controls body-related electronics like lights, windows, and locks. The ‘Check Engine’ light is related to the engine and emissions systems, which are controlled by the Engine Control Module (ECM) or Powertrain Control Module (PCM).