Are you chasing electrical gremlins in your 1999-2000 Silverado 1500? Flickering lights, power windows with a mind of their own, or a security light that keeps you from starting your truck are all classic signs of a failing Body Control Module (BCM). As the central nervous system for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and seemingly unrelated problems. Instead of spending a fortune at the dealership for a new module and programming, get this reliable, direct-fit solution.
This isn’t just a replacement part; it’s a complete fix. We flash the module with the latest GM software updates and program it specifically to your vehicle’s VIN before it ships. This means no expensive trips to the dealer for programming. It arrives ready for installation, simplifying the repair process and getting your truck back to 100% functionality quickly and affordably. Restore control over your truck’s essential features and drive with confidence again.
A Technician’s Notebook
I remember a 2000 Sierra 1500 that came into the shop with the most bizarre symptoms. The owner said the radio would randomly change stations, the dome light wouldn’t turn off, and sometimes the horn would honk when he used the turn signal. He’d already replaced the battery and checked all the fuses. After hooking up the scan tool, I saw a slew of communication error codes (U-codes) pointing to the BCM. A failing BCM can corrupt the data network, causing other modules to act erratically. We installed a VIN-programmed BCM, and it was like an exorcism for the truck’s electrical system. Every issue was resolved instantly. This is a common failure I’ve seen hundreds of times on these GMT800 platform trucks.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution for your 1999-2000 Silverado BCM issues:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition (Passlock failure).
- ✔ Gauges on the instrument cluster behaving erratically or not working.
- ✔ The radio or climate control system is malfunctioning.
- ✔ Diagnostic Trouble Codes (DTCs) such as U1000, U1016, B1004, or other B-series codes are present.
- ✔ The horn sounds unexpectedly or doesn’t work.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. The module is typically located on the driver’s side, under the dashboard.
- Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- Access the Module: Remove the lower dash panel (kick panel) below the steering column to expose the BCM. It’s usually a black box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug all wiring harnesses from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses. Ensure each connector clicks into place.
- Reconnect and Test: Reinstall the lower dash panel, reconnect the negative battery terminal, and turn the key to the ‘On’ position. Test all functions like windows, locks, lights, and wipers to confirm the repair.
Important Post-Installation Notes
While this BCM is programmed for your VIN, some vehicle systems may require a ‘handshake’ with the new module. 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 recalibration might be required to ensure proper brake light and traction control operation.
- No Core Charge: You are not required to return your old BCM. This saves you the time and expense of a core return.
Disclaimer: 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 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801. It is guaranteed to fit the following vehicles:
- 1999-2000 Chevrolet Silverado 1500 Pickup
- 1999-2000 Chevrolet Silverado 2500 Pickup
- 1999-2000 GMC Sierra 1500 Pickup
- 1999-2000 GMC Sierra 2500 Pickup
- 1998-2000 Chevrolet S10 / GMC S15/Sonoma
- 1998-2000 Chevrolet Blazer / GMC Jimmy S15
- 2000 Chevrolet Astro / GMC Safari
- 1998 Oldsmobile Bravada (w/ extended build date opt ZN4)
- 1999-2000 Isuzu Hombre
Do I need to do any programming after I receive this BCM?
Do I need to do any programming after I receive this BCM?
No. We program the module to your vehicle’s VIN number before we ship it. It arrives ready to be installed, saving you a trip to the dealership. You must provide your VIN at checkout.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the part to function correctly in your specific vehicle. We will contact you after your purchase to get the VIN if it’s missing.
Will this fix my ‘Security’ light and no-start problem?
Yes, a faulty BCM is the most common cause of Passlock security system failures on these GM trucks. Replacing it with this pre-programmed unit is the correct and permanent fix for that issue.
Is this a difficult part for a DIY mechanic to install?
The physical replacement is straightforward for most DIYers. It’s typically located under the driver’s side dash and involves removing a panel and swapping connectors. No special tools are needed for the installation itself.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep or dispose of your old module without any additional fees or hassle.