Are you battling frustrating electrical gremlins in your GM truck? Flickering lights, unresponsive power windows, or a security system that has a mind of its own are more than just annoyances—they’re signs that your Body Control Module (BCM) is failing. This critical component is the central nervous system for your truck’s body electronics. Instead of risking a costly and time-consuming trip to the dealership, get the definitive, reliable fix with our pre-programmed BCM, designed to get your truck back to work without the hassle.
Common Symptoms of a Failing BCM & Your Direct-Fit Solution
A faulty BCM can cause a wide range of confusing issues that can be difficult to diagnose. If your Sierra, Silverado, S10, or other compatible GM vehicle is experiencing any of the following, a failing BCM is the likely culprit:
- Interior or exterior lights not working correctly (staying on or not turning on)
- Power windows, door locks, or mirrors operating erratically or not at all
- The security or anti-theft system preventing the truck from starting
- Erratic gauge cluster behavior or warning lights
- Communication error codes (U-codes) when scanned with a diagnostic tool
This unit is your direct-fit, plug-and-play solution. We take all the guesswork out of the repair by flashing the module with the latest GM software updates, specifically coded to your truck’s unique Vehicle Identification Number (VIN). This ensures seamless integration and restores all factory-installed functions perfectly. This is the most efficient way to replace your failing 1999-2000 Sierra 1500 BCM and restore order to your vehicle’s electronics.
Features & Benefits
- ✔ Plug & Play Installation: Arrives pre-programmed to your specific VIN. No dealership visit required for programming, saving you time and money.
- ✔ Restored Functionality: Corrects common electrical issues, giving you back full control over your truck’s lights, locks, windows, and security systems.
- ✔ Latest GM Software: We flash each module with the newest vehicle-specific software from GM, ensuring optimal performance and reliability.
- ✔ No Core Charge: You are not required to return your old, faulty module. This means no extra deposit and no return shipping to worry about.
- ✔ Wide Compatibility: A direct replacement for multiple part numbers including 16257125, 19153625, and 09366801, covering a wide range of GM trucks, vans, and SUVs.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Insight on VIN Programming
As a technician with over two decades of experience, I can’t overstate the importance of VIN-specific programming for a BCM. In these late 90s/early 2000s GM vehicles, the BCM communicates with nearly every other module, from the powertrain controller to the airbag system. Installing a used BCM from a junkyard or a generic, non-programmed unit is a recipe for disaster. It can lead to feature mismatches (e.g., power window options not working), persistent warning lights, and even no-start conditions. By programming this 1999-2000 Sierra 1500 BCM to your exact VIN *before* it ships, we ensure it knows every option your truck was built with, guaranteeing a smooth installation and proper function from the moment you plug it in.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that controls the electronic accessories and body-related functions in your truck. This includes power windows, door locks, interior and exterior lighting, the alarm system, and wiper functions. When it fails, these systems can become unreliable.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. We will provide clear instructions on how to do this. We cannot ship your part until we receive the VIN, as the programming is essential for it to work in your vehicle.
Is this a difficult part to install myself?
For most of these GM trucks, the BCM is located under the driver’s side or center of the dashboard and is typically held in by a few bolts or clips. For someone with basic mechanical skills, it’s a very manageable DIY job. The key benefit here is that the complex programming step is already done for you.
Do I need to send my old BCM back?
No. This product has no core charge. You can keep your original module, which saves you the time and expense of shipping a part back.
What if my airbag light is on after I install the new BCM?
In some cases, the new BCM may need to be synced with the airbag system (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that must be performed with a professional-grade scan tool. This is only necessary if the airbag warning light appears after installation.
Will this part fit my 1999 Silverado 2500?
Yes, this 1999-2000 Sierra 1500 BCM is also a direct fit for many other models, including the 1999-2000 Silverado 1500/2500, S10/Blazer, and GMC Sonoma/Jimmy that use part number 16257125. Please check the full fitment list on this page to confirm compatibility.