Restore Full Functionality to Your GM Truck or Van
Are you battling bizarre electrical issues in your Silverado, Sierra, S10, or Astro? Problems like flickering lights, unpredictable power windows and locks, a security light that won’t turn off, or even a frustrating no-start condition often point to one culprit: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can create a cascade of hard-to-diagnose problems. This replacement 1999-2000 GM BCM is the definitive, hassle-free solution to get your vehicle operating correctly again.
From the Diagnostic Bay: The Case of the Ghostly Gauges
I remember a 2000 Silverado 1500 that came into my shop with a laundry list of complaints from the owner. The interior lights would pulse, the radio would cut out, and occasionally the truck just wouldn’t start. He’d already replaced the battery and alternator. After hooking up my scan tool, I found multiple communication loss codes (U-codes) with various modules. This is a classic sign. Instead of chasing individual components, I went straight for the BCM. A quick check of the data stream confirmed erratic voltage outputs. Swapping in a properly programmed BCM solved every single issue. These modules are notorious for internal solder joint failures over time, leading to exactly this kind of electrical chaos.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
- ✔ Inconsistent horn operation or keyless entry failure.
The Easiest BCM Replacement You’ll Ever Do
Forget expensive trips to the dealership for programming. We take care of the hard part for you. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will flash this module with the latest, most stable software directly from GM. It arrives at your door ready for installation. This service ensures perfect compatibility with your truck’s specific options and systems, making the repair process as smooth as possible. Plus, with our no core charge policy, you can keep your old part without any extra fees or hassle.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most of these GM trucks and vans, the BCM is located in the dash. For S10/Blazer models, it’s typically in the center dash area. For Silverado/Sierra and Astro/Safari models, it’s usually on the left-hand (driver’s) side of the dash.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the old BCM and remove it from the vehicle.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors.
- ✔ Power Up and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, etc.—to confirm the repair.
Important Post-Installation Information
While this 1999-2000 GM BCM is programmed for a direct installation, some vehicles may require additional steps to synchronize all systems. Please be aware of the following:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light and traction control operation.
Will This Fit My Truck or Van?
This module is a direct replacement for part number 16257125 and other interchangeable numbers. It is guaranteed to fit the following vehicles with the specified options:
- 1998-2000 Chevrolet S10 / GMC Sonoma: Body Control (BCM); (center dash), ID 16257125
- 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15: Body Control (BCM); (center dash), ID 16257125
- 1999-2000 Chevrolet Silverado 1500/2500: Body Control (BCM); (LH dash)
- 1999-2000 GMC Sierra 1500/2500: Body Control (BCM); (LH dash)
- 2000 Chevrolet Astro / GMC Safari: Body Control (BCM); (LH dash)
- 1998 Oldsmobile Bravada: Body Control (BCM); (center dash), w/extended build date (opt ZN4)
- 1999-2000 Isuzu Hombre: Body Control (BCM); (LH dash)
This part is also a direct replacement for part numbers: 19153625, 8191536250, 191583625, 8093668010, 8162571250, and 09366801.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and calibrations for your vehicle’s specific features and options. This ensures a seamless installation and proper function without a trip to the dealer.
Is this part difficult to install for a DIYer?
The physical replacement is straightforward for someone with basic mechanical skills. It involves removing a few dash panels and unplugging connectors. Since we handle the programming, the most complex part of the job is already done for you.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the brain for your vehicle’s electronic accessories. It controls functions like power windows, locks, interior/exterior lighting, the alarm system, and the instrument panel gauges.
Do I have to send my old part back?
No. We do not require you to return your original module. There is no core charge associated with this purchase, saving you time and money.
What if my airbag light comes on after I install it?
This is a known possibility. It simply means the new BCM needs to be electronically introduced to the vehicle’s airbag module (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.