End the Electrical Headaches in Your GM Truck
If you’re dealing with bizarre electrical issues in your 1999-2000 Silverado 1500—like power windows with a mind of their own, flickering interior lights, or a security system that randomly prevents your truck from starting—you’re not alone. These are classic signs of a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, when the BCM goes bad, it can create a cascade of frustrating and seemingly unrelated problems. This isn’t just an annoyance; it can affect vehicle security and safety.
This is a direct-replacement Body Control Module, delivered to your door already programmed to your truck’s specific VIN. We handle the complex part, loading the latest GM software onto the module before we ship it. This means you can skip the expensive trip to the dealership for programming. It’s a straightforward solution designed to restore the factory functionality and reliability you depend on.
Case Study: A Tricky Diagnosis
I remember a 2000 Sierra 1500 that came into my shop with a complaint of intermittent no-start and the security light flashing. The owner had already replaced the battery and ignition switch. A quick scan showed a loss of communication code (U1000) between several modules. Instead of just throwing parts at it, we checked the BCM connectors for corrosion—a common issue. They were clean. The root cause, which I’ve seen dozens of times on these GMT800 platforms, was internal failure of the BCM’s circuit board. Swapping in a VIN-programmed BCM like this one resolved all the issues in under an hour. The customer was back on the road without paying for dealership-level diagnostic and programming fees.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior dome lights or dashboard lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U-codes, or specific BCM faults.
- ✔ Inconsistent operation of the radio or climate controls.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- ✔ Locate the BCM: On most 1999-2000 Silverado and Sierra models, the BCM is located on the driver’s side, up under the dashboard to the left of the steering column.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors 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 Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure they click 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, etc.—to confirm the repair.
Important Post-Installation Steps
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:
- Airbag System Sync: If the 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 airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and traction control functionality.
We believe in transparency. Not every truck will require these steps, but it’s a possibility. Always consult a factory service manual for your specific vehicle if you are unsure.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, 09366801 and fits the following vehicles:
- ✔ 1999-2000 Chevrolet Silverado 1500 / 2500
- ✔ 1999-2000 GMC Sierra 1500 / 2500
- ✔ 1998-2000 Chevrolet S10 / Blazer
- ✔ 1998-2000 GMC S15 Sonoma / Jimmy
- ✔ 2000 Chevrolet Astro / GMC Safari
- ✔ 1998 Oldsmobile Bravada (w/ extended build date opt ZN4)
- ✔ 1999-2000 Isuzu Hombre
Frequently Asked Questions
Do I need to send you my old BCM?
No, there is no core charge for this part. You can keep your original module.
What does ‘VIN Programmed’ actually mean?
It means we load your truck’s specific Vehicle Identification Number (VIN) and the corresponding factory software onto the module before shipping. This ensures it communicates correctly with your vehicle’s other computers, saving you a programming fee at a dealership.
What if my airbag light comes on after I install it?
This can happen occasionally. It means the airbag system needs to be synced with the new BCM. This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be done by a repair shop with a professional-grade diagnostic tool.
Is this a difficult part for a DIYer to replace?
The physical replacement is straightforward for someone with basic mechanical skills. It’s typically located under the driver’s side dash and involves unplugging connectors and removing a few bolts. The main benefit here is that the difficult software programming is already done for you.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship the module until we have this information to program it correctly for your truck.