If you’re dealing with baffling electrical problems in your late 90s or early 2000s GM truck or van—like flickering dash lights, power windows with a mind of their own, or a security light that prevents your engine from starting—you’ve likely met the culprit: a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can create a cascade of frustrating, seemingly unrelated issues. This isn’t just an annoyance; it can affect vehicle security and safety systems.
We offer a straightforward, reliable solution. This is a replacement Body Control Module, part number 19153625, that arrives at your door fully programmed to your vehicle’s specific VIN. We install the latest GM software updates, ensuring optimal performance and compatibility. This eliminates the need for an expensive trip to the dealership for programming. With our Programmed GM BCM, you get a dependable fix that restores your vehicle’s electronic functions to factory-spec operation.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional interior/exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light stays on, often causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Dashboard gauges behaving erratically or going dead.
- ✔ Rapid battery drain while the vehicle is off (parasitic draw).
A Technician’s Notebook: The Silverado That Wouldn’t Start
A customer brought in a ’99 Silverado 1500 with an intermittent no-start. He’d already replaced the battery and starter, but the truck would randomly refuse to crank. The security light on the dash was the key. In my shop, I’ve seen this exact scenario dozens of times. The Passlock sensor data runs through the BCM. When the BCM’s internal circuits fail, it can’t validate the key, triggering the anti-theft system and disabling the starter. We installed a VIN-programmed BCM, and the problem was solved instantly. It’s a classic case where the issue seems like a starting system problem but is actually rooted in the vehicle’s electronic brain.
A Straightforward Guide to Your BCM Installation
- ✔ Step 1: Safety First. Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Step 2: Locate the BCM. On most of these models, the BCM is located under the driver’s side or center of the dashboard. It’s a small black box with several large electrical connectors. Check your service manual for the exact position.
- ✔ Step 3: Disconnect and Remove. Carefully unplug the wiring harnesses from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Step 4: Install the New Module. Mount your new, pre-programmed BCM in place and securely plug in all the wiring harnesses. You should hear a click as they lock in.
- ✔ Step 5: Reconnect and Test. Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, horn, etc.—to ensure everything is working correctly.
Important Post-Installation Information
While this Programmed GM BCM is designed for a simple installation, some vehicles may require additional steps for full system integration:
- 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 necessary 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, and 09366801. It fits the following vehicles:
- 1998-2000 S10/S15/Sonoma (Center Dash, ID 16257125)
- 1998-2000 Blazer S10/Jimmy S15 (Center Dash, ID 16257125)
- 1999-2000 Isuzu Hombre (LH Dash)
- 1999-2000 Sierra 1500/2500 Pickup (LH Dash)
- 1999-2000 Silverado 1500/2500 Pickup (LH Dash)
- 2000 Astro Van (LH Dash)
- 2000 Safari Van (GMC) (LH Dash)
- 1998 Bravada (Center Dash, w/extended build date opt ZN4)
Frequently Asked Questions
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings specific to your truck’s factory-installed options. This ensures seamless integration and proper function of all electronic features, just like the original part.
What exactly does a Body Control Module do?
The BCM is the computer that manages the electronic accessories in your vehicle’s body. This includes power windows, locks, interior and exterior lighting, the horn, wipers, and the anti-theft system. When it fails, these systems can become unreliable.
Is this a difficult part to install for a DIYer?
For most individuals with basic mechanical skills, this is a very manageable job. The primary challenge is accessing the module under the dashboard. Since our module comes pre-programmed, you avoid the most complex part of the process—no special computer tools are needed for the initial setup.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Do I need to send my old BCM back?
No, there is absolutely no core charge for this part. You can keep your original module.