Restore Your Truck’s Electrical System with a Plug-and-Play Solution
Are you chasing electrical gremlins in your GM truck or SUV? Flickering lights, malfunctioning power windows and locks, a security light that won’t turn off, or a dashboard that seems to have a mind of its own are all classic signs of a failing Body Control Module (BCM). In my 20+ years of diagnostics, I’ve seen these exact symptoms stump even seasoned mechanics. The BCM is the central hub for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This isn’t just an annoyance; it can affect vehicle security and safety systems.
This is your direct-fit, reliable solution. We offer a professionally prepared 1999-2000 GM BCM that arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures seamless integration with your truck’s existing systems, saving you from expensive programming fees and a trip to the dealership. We flash the module with the latest GM software updates, so you’re getting a part that performs correctly right out of the box.
Case Study: A Tricky Diagnosis
I remember a 1999 Silverado that came into the shop with a complaint of the security light staying on and the radio and power locks working intermittently. The owner had already replaced the battery and checked all the fuses. A basic code scan showed nothing. However, by monitoring the data stream from the BCM, we could see erratic voltage outputs to the very circuits he was having issues with. It was the classic ‘ghost in the machine’ scenario caused by a failing BCM. We installed a VIN-programmed module just like this one, and all the problems vanished instantly. It’s a fix that restores both function and peace of mind.
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 GM BCM issues:
- ✔ Erratic or non-functional interior/exterior lights
- ✔ Power windows, door locks, or mirrors working intermittently or not at all
- ✔ The security or anti-theft system light stays on, preventing the engine from starting
- ✔ Horn honking unexpectedly or not working
- ✔ Instrument cluster gauges behaving erratically or going dark
- ✔ Communication error codes with other modules (U-codes)
A Straightforward Guide to Installation
Installing your new BCM is a manageable job for a DIY enthusiast. The key is our VIN programming service, which handles the most complex part for you. Just follow these general steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Provide Your VIN: After purchase, you must send us your 17-digit VIN. We cannot ship your part until we program it.
- Locate the BCM: On most of these models, the BCM is located under the driver’s side or center of the dashboard. It’s typically a black plastic box with several large electrical connectors.
- Remove the Old Module: Carefully unplug the wiring harnesses from the old BCM. They have locking tabs that need to be depressed. Once unplugged, unbolt the module from its mounting bracket.
- Install the New Module: Bolt the new, pre-programmed BCM into place and securely reconnect all wiring harnesses. You should hear a ‘click’ as they lock in.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions—lights, locks, windows, etc.—to ensure proper operation.
Important Post-Installation Notes
In some cases, additional synchronization procedures may be required after installation. This is normal and depends on your specific vehicle’s configuration.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a professional-grade diagnostic scan tool.
- Brake Pedal Position Relearn: Some models may require a recalibration of the brake pedal position sensor to ensure correct brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified technician for procedures specific to your vehicle.
Will This Fit My Truck?
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:
- 1998-2000 Chevrolet S10 / GMC Sonoma (Center Dash, ID 16257125)
- 1998-2000 Chevrolet Blazer S10 / GMC Jimmy S15 (Center Dash, ID 16257125)
- 1999-2000 Chevrolet Silverado 1500/2500 (LH Dash)
- 1999-2000 GMC Sierra 1500/2500 (LH Dash)
- 2000 Chevrolet Astro (LH Dash)
- 2000 GMC Safari (LH Dash)
- 1998 Oldsmobile Bravada (Center Dash, w/ extended build date opt ZN4)
- 1999-2000 Isuzu Hombre (LH Dash)
Frequently Asked Questions
Do I need to send my original BCM back?
No, there is no core charge for this part. You can keep your original module.
What happens if I don’t provide my VIN?
We cannot ship the BCM until we receive your 17-digit VIN. The programming is essential for the part to function correctly in your specific vehicle. Please provide it during or after checkout to avoid delays.
Is this a plug-and-play part?
Yes, for most vehicles, it is. Because we pre-program it to your VIN, you can typically install it and go. However, as noted, some vehicles may require an additional relearn procedure for the airbag or brake systems with a scan tool.
Will this fix my no-start problem?
It can. A common failure of the 1999-2000 GM BCM is in the Passlock/Passkey anti-theft system. If the security light is on and the engine won’t crank or start and die, a faulty BCM is a very common cause.
What if my original part number isn’t 19153625?
This module replaces several part numbers, including 16257125, 09366801, and others listed above. As long as your vehicle is on the compatibility list and your original part is one of the listed interchanges, this module will work.