Are you tired of chasing electrical gremlins in your GM truck or SUV? One day the power windows work, the next they don’t. Maybe your security light is flashing, the radio is acting possessed, or the gauges are sweeping for no reason. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and they almost always point to one culprit: a failing Body Control Module (BCM).
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a reliable BCM, part number 19153625, and professionally flash it with the latest GM-approved software specifically for your vehicle. All we need is your VIN. This eliminates the most expensive and frustrating step of the repair—no dealership visits for programming, no special tools, and no subscription fees. You get a fully functional module that restores control over your vehicle’s body electronics, delivered right to your door.
Is Your Truck Showing These Symptoms?
A failing BCM can cause a cascade of confusing problems. If your vehicle is experiencing any of the following, a new Programmed GM BCM is likely the solution you need:
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (dome lights staying on, headlights flickering).
- ✔ Security system faults, such as a flashing security light or a no-start condition.
- ✔ Gauges on the instrument cluster behaving strangely or not working at all.
- ✔ The radio or other accessories turning on and off by themselves.
- ✔ False warning lights on the dash, including the airbag light.
- ✔ Communication issues that may generate DTCs like U0140 (Lost Communication With Body Control Module).
Case Study: A Tricky Diagnosis
I remember a 1999 Silverado 1500 that came into the shop with a classic BCM failure story. The owner was frustrated because his battery kept dying overnight. He’d already replaced the battery and alternator. We found a parasitic draw, but it was intermittent. The dome light would randomly come on hours after the truck was parked. After confirming all door switches were good, we traced the fault to the BCM’s internal logic. It was randomly waking up and activating circuits. A new Programmed GM BCM, flashed to his VIN, solved the battery drain and restored all body functions perfectly. It’s a textbook example of how a faulty BCM can cause symptoms that seem unrelated at first glance.
A Straightforward Guide to BCM Installation
Replacing the BCM on these GM vehicles is a manageable job for a DIY enthusiast. The location varies slightly, but it’s typically found in the dash. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most Silverado/Sierra/Astro/Safari models, it’s on the left-hand (driver’s) side of the dash. For S10/Blazer/Jimmy models, it’s often located in the center dash area. A quick search for your specific model will confirm its location.
- Access the Module: You will likely need to remove a lower dash panel or knee bolster to gain access. These are usually held in with a few screws or clips.
- 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 module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed module in the same location. Securely plug in all the 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, radio, etc.
Important Post-Installation Notes
Because this Programmed GM BCM is the central hub for many systems, a couple of simple relearn procedures may be needed after installation:
- Airbag System Sync: If your airbag warning light is on after installation, a shop with a capable scan tool will need to perform the “Setup SDM Primary Key in BCM” procedure. This is a quick process that syncs the new BCM with the airbag module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary for correct brake light and traction control operation.
Disclaimer: Procedures can vary. Always consult a factory service manual for instructions specific to your vehicle.
Verified Vehicle Compatibility
This module is a direct-fit, pre-programmed solution for the following vehicles. It replaces part numbers 19153625, 8191536250, 16257125, 191583625, 8093668010, 8162571250, and 09366801.
- Chevrolet S10 / GMC Sonoma (1998-2000): Body Control (BCM); (center dash), ID 16257125
- Chevrolet Blazer / GMC Jimmy (1998-2000): Body Control (BCM); (center dash), ID 16257125
- Chevrolet Silverado 1500/2500 (1999-2000): Body Control (BCM); (LH dash)
- GMC Sierra 1500/2500 (1999-2000): Body Control (BCM); (LH dash)
- Chevrolet Astro / GMC Safari (2000): Body Control (BCM); (LH dash)
- Oldsmobile Bravada (1998): Body Control (BCM); (center dash), w/extended build date (opt ZN4)
- Isuzu Hombre (1999-2000): Body Control (BCM); (LH dash)
Frequently Asked Questions
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
Is this BCM really plug-and-play?
Yes! We program it to your vehicle’s VIN before shipping, so it’s ready for installation without needing a trip to the dealer. In some cases, minor relearn procedures for the airbag or brake systems may be required post-installation, as noted above.
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). This is crucial for us to program the module correctly.
Where is the BCM located on my 2000 Sierra?
On the 1999-2000 Sierra and Silverado, the BCM is located on the driver’s side, behind the lower dash panel to the left of the steering column.
Will this fix my ‘Security’ light issue?
In many cases, yes. The BCM is integral to the Passlock security system on these vehicles. A failing BCM is a very common cause of a flashing security light and related starting problems.