Are you tired of chasing electrical gremlins in your GM truck or SUV? Flickering lights, a security system that won’t cooperate, or power windows and locks with a mind of their own are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, when the BCM falters, it can cause a host of frustrating and unpredictable issues. This isn’t just an annoyance; it can affect your vehicle’s security and daily usability. Stop the guesswork and expensive diagnostic fees with a reliable, direct-fit solution.
This is a replacement Body Control Module for 1998-2000 GM vehicles that arrives at your door fully programmed to your vehicle’s specific VIN. We load it with the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This eliminates the need for a costly trip to the dealership for programming—a step that can often cost as much as the part itself. Simply provide your VIN at checkout, and we handle the rest.
A Technician’s Notebook
I remember a 1999 Silverado that came into the shop with the strangest collection of symptoms. The owner said his radio would turn off randomly, the dome light would flicker while driving, and sometimes the power locks wouldn’t respond. He’d already replaced the battery and checked all the fuses. We connected the scan tool and found a slew of communication error codes (U-codes) pointing to a network issue. After tracing the wiring, all signs pointed to an internal failure in the BCM. These modules, especially on the GMT400 and early GMT800 platforms, are notorious for failing due to heat cycles and aging solder joints. We installed a pre-programmed 1998-2000 GM BCM, and it was like flipping a switch. All the phantom electrical issues vanished instantly. It’s a textbook case I’ve seen dozens of times.
Common Signs of a Failing Body Control Module
If your vehicle is experiencing any of the following, a faulty BCM is the likely culprit:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ The security or anti-theft light stays on, preventing the vehicle from starting.
- ✔ Interior or exterior lights flicker, stay on, or don’t work at all.
- ✔ The horn honks unexpectedly or doesn’t work when pressed.
- ✔ Wipers operate intermittently or at the wrong speed.
- ✔ Instrument cluster gauges behave erratically or stop working.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss (U-codes) are present.
A Straightforward Guide to Installation
Installing your new BCM is a manageable job for a DIYer with basic tools. Because we’ve handled the programming, you can skip the dealership visit.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On most of these models, the BCM is located in the dashboard. For S10/Blazer/Jimmy models, it’s typically in the center dash area. For Silverado/Sierra/Astro/Safari models, it’s usually on the lower left-hand (driver’s) side.
- Remove the Old Module: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat your new, pre-programmed BCM into the mounting bracket and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair.
- Perform Relearns (If Needed): Start the vehicle. If an airbag warning light appears or you notice brake light issues, proceed with the post-installation procedures noted below.
Post-Installation Requirements
In some cases, your vehicle may require a simple sync procedure after the new 1998-2000 GM BCM is installed:
- Airbag System Sync: If the airbag warning light is illuminated 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. This is only required if the light is on.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light and traction control operation.
Disclaimer: Specific procedures can vary by vehicle. 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, 8191536250, 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 / GMC Safari (LH dash)
- ✔ 1998 Oldsmobile Bravada (center dash, w/ extended build date opt ZN4)
- ✔ 1999-2000 Isuzu Hombre (LH dash)
Plus, there is no core charge. You can keep your old module without any extra fees or hassle.
Frequently Asked Questions
Do I need to program this BCM?
No. This is the biggest benefit of our service. We program the module to your vehicle’s VIN before shipping it, so it’s ready for installation right out of the box. This saves you a trip to the dealer and hundreds in programming fees.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We cannot program and ship the module without it.
Will this fix my Passlock security system problem?
Yes, in most cases. A faulty BCM is the number one cause of Passlock/VATS security issues in these GM vehicles, such as a security light that stays on and prevents the engine from starting. Replacing the BCM with a correctly programmed unit typically resolves these problems.
Where is this BCM located on my 2000 Silverado?
On the 1999-2000 Silverado and Sierra pickups, the BCM is located on the driver’s side, up under the dashboard to the left of the steering column.
Is there a core charge for this part?
No, there is absolutely no core charge. You are not required to send your old, faulty module back to us.
What if my airbag light is on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag control module (SDM). This procedure, called ‘Setup SDM Primary Key in BCM’, must be performed with a bi-directional scan tool and will resolve the light.