Restore Your Truck’s Electrical System with a Reliable, Programmed BCM
If you’re dealing with flickering lights, malfunctioning power windows, a haywire security system, or other bizarre electrical issues in your 1999-2000 GMC Sierra 1500, the culprit is often a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating problems. This isn’t just an inconvenience; it can affect vehicle security and safety. This replacement BCM is your direct-fit, reliable solution. We take the guesswork and dealership hassle out of the equation by programming the module to your truck’s specific VIN before we ship it. This ensures it communicates perfectly with your vehicle’s other systems right out of the box.
I once had a 2000 Sierra 1500 in my bay with a classic ‘phantom drain’ issue. The battery would be dead every two or three days. The owner had already replaced the battery and alternator. After hours of testing circuits, I traced the drain back to the BCM. It wasn’t fully ‘sleeping’ when the truck was off, keeping the interior lights relay energized just enough to kill the battery over time. Swapping in a correctly programmed BCM like this one solved the problem instantly. It’s a common failure mode I’ve seen dozens of times on these GMT800 platform trucks.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft system acting up, preventing the truck from starting.
- ✔ Horn honking randomly or not working when pressed.
- ✔ Dashboard warning lights illuminating for no reason.
- ✔ Communication error codes (U-codes) when scanned with a diagnostic tool.
The Simple Path to a Lasting Fix for Your 1999-2000 Sierra 1500 BCM
Don’t let a complex part intimidate you. The biggest hurdle with BCM replacement has always been the expensive programming required at a dealership. We handle that for you. By providing your VIN at checkout, you receive a module that’s loaded with the latest GM software and configured specifically for your truck’s options. This is the most efficient way to restore your vehicle’s functionality without paying for specialized tools or dealer labor rates. Plus, there is absolutely no core charge—you can keep your old part.
A Straightforward Guide to BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- ✔ Locate the BCM: On most 1999-2000 Sierra/Silverado models, the BCM is located on the driver’s side, up under the dashboard to the left of the steering column.
- ✔ Remove Connectors: Carefully unplug the multiple electrical connectors from the old BCM. They have release tabs that need to be pressed. Do not force them.
- ✔ Unbolt the Module: Remove the bolts or nuts holding the BCM bracket in place and carefully lower the old module out from under the dash.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location and secure it. Reconnect all electrical connectors, ensuring they click firmly into place.
Important Post-Installation Notes
In some cases, additional synchronization procedures may be required after installation. This is normal and depends on your vehicle’s specific configuration. Key procedures include:
- 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 new BCM with the airbag system.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor relearn might be necessary.
Verified Vehicle Compatibility
This module, identified by part number 16257125, is a direct replacement for part number 19153625 and others. It is guaranteed to fit the following vehicles:
- SIERRA 1500 PICKUP 1999-2000: Body Control (BCM); (LH dash)
- SILVERADO 1500 PICKUP 1999-2000: Body Control (BCM); (LH dash)
- SIERRA 2500 PICKUP 1999-2000: Body Control (BCM); (LH dash)
- SILVERADO 2500 PICKUP 1999-2000: Body Control (BCM); (LH dash)
- S10/S15/SONOMA 1998-2000: Body Control (BCM); (center dash), ID 16257125
- BLAZER S10/JIMMY S15 1998-2000: Body Control (BCM); (center dash), ID 16257125
- ASTRO / SAFARI 2000: Body Control (BCM); (LH dash)
- BRAVADA 1998: Body Control (BCM); (center dash), w/extended build date (opt ZN4)
- ISUZU HOMBRE 1999-2000: Body Control (BCM); (LH dash)
This module also replaces part numbers: 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801.
Frequently Asked Questions
Why do you need my VIN?
Your VIN (Vehicle Identification Number) allows us to program the BCM with the exact software and settings for your truck’s specific features, like power windows, keyless entry, and security system. This ensures it works correctly right out of the box.
Is this a simple plug-and-play installation?
Yes, because we program it beforehand, the physical installation is plug-and-play. However, as with any BCM replacement, some vehicles may require a simple relearn procedure for the airbag or brake systems, which may require a diagnostic tool.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, saving you the time and expense of shipping a core back.
Will this fix my truck’s no-start problem?
If your no-start issue is caused by the factory anti-theft system (Passlock) being controlled by a faulty BCM, then yes, this part will resolve it. The programming we perform correctly syncs the security information.
What if my airbag light comes on after I install it?
This is an indication that the new BCM needs to be synced with the airbag module (SDM). A mechanic with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.