Is your GMC Sierra or Chevy Silverado acting possessed? Flickering lights, power windows with a mind of their own, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen these exact issues countless times. The BCM is the central hub for your truck’s body electronics, and when it starts to fail, it can cause a cascade of frustrating and unpredictable problems. Don’t let electrical gremlins keep you off the road. This is the direct, reliable solution you’ve been searching for.
We take the guesswork and dealer-level expense out of the equation. This BCM isn’t a blank slate; it arrives at your door pre-programmed with the latest GM software, specifically matched to your truck’s Vehicle Identification Number (VIN). This means no expensive trips to the dealership for programming. You get a component that’s ready to install right out of the box, restoring your vehicle’s functions and getting you back to work. Simply provide your VIN at checkout, and we’ll handle the rest.
A Technician’s Notebook
I remember a 2000 Sierra 1500 that came into my bay with the strangest problem: the radio would turn on and off by itself, and the interior dome light would flicker when hitting bumps. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I found no communication codes, which can be misleading. Based on experience, I went straight for the BCM, located under the driver’s side dash. A quick inspection revealed tell-tale signs of corrosion on one of the connectors from a minor windshield leak. Swapping in a pre-programmed BCM like this one solved every single issue in under 30 minutes. It’s often the central component causing these widespread, bizarre symptoms.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft light is illuminated, potentially causing a no-start condition.
- ✔ Inconsistent or dead dashboard gauges.
- ✔ Communication error codes (U-codes) stored in the system.
- ✔ The horn honking randomly or the alarm system malfunctioning.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most 1999-2000 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, to the left of the steering column.
- ✔ Remove Connectors: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed to release.
- ✔ Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and remove it. Install your new, pre-programmed BCM in its place.
- ✔ Reconnect Everything: Securely plug all the electrical connectors into the new BCM. You should hear a ‘click’ as they lock in place. Reconnect the negative battery terminal.
- ✔ Final Checks: Turn the key to the ‘On’ position and test all functions—windows, locks, lights, and gauges—to ensure proper operation.
Important Steps After Installation
While this module is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- 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: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly.
Disclaimer: We are committed to providing you with a seamless repair. However, specific procedures can vary. Always consult a factory service manual or a qualified technician for guidance.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 16257125, 19153625, 8191536250, 191583625, 8093668010, 8162571250, 09366801 and fits the following vehicles:
- 1999-2000 GMC Sierra 1500 / 2500 Pickup
- 1999-2000 Chevrolet Silverado 1500 / 2500 Pickup
- 1998-2000 Chevrolet S10 / GMC S15 Sonoma
- 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15
- 2000 GMC Safari / Chevrolet Astro
- 1998 Oldsmobile Bravada (w/ extended build date opt ZN4)
- 1999-2000 Isuzu Hombre
Frequently Asked Questions
What does ‘VIN Programmed’ mean for me?
It means we load your vehicle’s specific software onto the BCM before shipping it. This makes the installation process much simpler, as it avoids the need for an expensive programming service at a dealership.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) is typically located on a tag on the driver’s side of the dashboard (viewable through the windshield) or on the sticker in the driver’s side door jamb.
Is this a difficult part to replace for a DIYer?
For someone with basic mechanical skills, this is a very manageable job. The BCM is usually accessible under the dash, and the main challenge is simply unplugging and replugging the connectors. No special tools are typically required for the swap itself.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
What if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically synced with your vehicle’s airbag module (SDM). This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure.