Is Your GM Truck Experiencing Electrical Gremlins?
If you’re dealing with flickering lights, malfunctioning power windows or locks, a security system that won’t cooperate, or a battery that mysteriously dies overnight, a failing Body Control Module (BCM) is the most likely culprit. In 1998-2000 GM trucks and SUVs like the Blazer, Jimmy, S10, and Silverado, the BCM acts as the central hub for all non-engine related electronics. When it fails, it can create a cascade of frustrating and seemingly unrelated issues. Don’t let a faulty module take your reliable truck off the road. This is the direct, reliable solution you need.
The Plug-and-Play Solution for Your 1998-2000 Blazer BCM
Forget expensive dealership visits and the hassle of finding a shop that can program a new module. We take care of the hard part for you. This Body Control Module is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives at your door ready for a straightforward installation. We flash it with the latest, most stable software updates from GM, ensuring optimal performance and longevity. This isn’t just a replacement; it’s a definitive fix for the common electrical issues plaguing these vehicles.
From the Diagnostic Bay
We had a ’99 Jimmy S15 come into the shop with a classic ‘haunted truck’ complaint. The dome lights would flicker at random, the horn would honk when turning, and the battery would be dead every morning. The owner had already replaced the battery and alternator to no avail. A quick scan showed no communication with the BCM. After confirming solid power and ground connections to the module under the dash, we knew the BCM itself had failed internally, causing a parasitic draw and sending erratic commands. Swapping in a pre-programmed BCM like this one resolved every single issue in under an hour, getting a very happy customer back on the road.
Common Failure Symptoms & Key Features
- ✔ Restores Full Functionality: Corrects issues with power windows, door locks, interior/exterior lighting, and radio controls.
- ✔ Security System Fix: Solves Passlock security system problems that can cause a no-start condition or a constantly flashing security light.
- ✔ Truly Plug & Play: Arrives pre-programmed to your vehicle’s VIN. No dealership visit or additional programming is required for operation.
- ✔ Updated GM Software: Flashed with the latest vehicle-specific software for improved performance and reliability over the original unit.
- ✔ Broad Compatibility: A direct replacement for part numbers 19153625, 16257125, 191583625, and others, fitting a wide range of GM trucks and vans.
- ✔ No Core Charge: Keep your original module. There’s no need to worry about core returns or extra charges.
Installation and Post-Install Notes
Installation is simple for the DIY mechanic. The BCM is typically located under the dashboard, either in the center console area or on the driver’s side. Simply disconnect the vehicle’s battery, carefully unplug the electrical connectors from the old BCM, unbolt it, and install the new one in its place. After reconnecting the battery, your vehicle’s primary functions should be restored. However, please be aware of a couple of potential post-installation procedures that may be necessary:
- Airbag System Sync: If your airbag warning light is on after installation, it does not mean the BCM is faulty. The new module simply needs to be synchronized with the airbag system’s SDM. A technician with a professional diagnostic tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light and traction control operation.
This 1998-2000 Blazer BCM is the most efficient way to solve your truck’s body electrical problems and restore the convenience and safety features you rely on every day.
Frequently Asked Questions
Do I need to have this BCM programmed by a dealer?
No. We program the module to your vehicle’s 17-digit VIN before we ship it to you. It will arrive ready for installation, saving you time and money.
What information do you need from me?
After you place your order, you will need to provide us with your vehicle’s VIN. This is essential for us to program the BCM correctly for your specific options and configuration.
Where is the BCM located on my 1999 S10 Blazer?
On the 1998-2000 S10/S15 Blazer and Jimmy models, the BCM is typically located behind the passenger side of the dashboard, near the center console area. On Silverado/Sierra models, it’s often on the driver’s side.
My airbag light is on after installing the new BCM. Is it defective?
No, this is a normal possibility. The new BCM needs to be electronically ‘introduced’ to the airbag’s computer (SDM). A repair shop will need to perform a quick ‘Setup SDM Primary Key in BCM’ procedure with a bi-directional scan tool to turn off the light.
Will this part fix my intermittent 4-wheel drive issues?
No, the BCM does not control the 4WD system. Those functions are managed by the Transfer Case Control Module (TCCM), which is a separate computer.
Is this a new or used part?
This is a professionally restored and tested OEM component. It is guaranteed to meet or exceed original factory specifications and is backed by our warranty.