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, or the vehicle refuses to start intermittently. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of time, and they almost always point to a failing Body Control Module (BCM). This isn’t just a part; it’s the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and unpredictable problems.
We’re offering a reliable, direct-fit solution. This BCM, compatible with part number 191583625 and others, is the definitive fix for those hard-to-diagnose electrical faults. The best part? We handle the complicated part for you. Simply provide your vehicle’s VIN at checkout, and our experts will program the module with the latest GM software specifically for your truck or SUV. It arrives at your door ready for installation, saving you a costly trip to the dealership and the expense of specialized programming tools. This is the most straightforward way to restore full functionality to your vehicle’s accessories and security systems.
From the Diagnostic Bay
I remember a 1999 Silverado 1500 that came into the shop with a classic BCM failure story. The owner was at his wit’s end. The radio would turn on and off by itself, the dome light would flicker while driving, and sometimes the truck just wouldn’t crank. He’d already replaced the battery and checked the alternator. After hooking up the scan tool, I saw a handful of communication codes (U-codes) pointing to the BCM. Instead of a lengthy and expensive dealer visit, we installed a pre-programmed 1998-2000 GM BCM. The electrical chaos stopped instantly. The customer was thrilled to have his reliable truck back without the dealership hassle and cost.
Is Your Truck Showing These BCM Failure Symptoms?
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that flicker, stay on, or don’t work at all.
- ✔ A security light that is always on or flashing, often causing a no-start condition.
- ✔ Gauges on the instrument cluster behaving strangely or not working.
- ✔ The radio or climate control system functioning intermittently.
- ✔ Diagnostic Trouble Codes (DTCs) related to body systems or communication errors (B-codes, U-codes).
A Straightforward Guide to BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most of these models, the BCM is located behind the dashboard, often on the driver’s side (LH dash) or in the center dash area. A quick search for your specific model will confirm its location.
- ✔ 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 Module: Mount your new, pre-programmed BCM in the same location and securely plug in all the electrical connectors. Ensure 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, radio, etc.—to confirm proper operation.
Post-Installation Note: In some cases, additional steps may be needed. If your airbag light is on, a professional scan tool is required for the ‘Setup SDM Primary Key’ procedure. A ‘Brake Pedal Position Relearn’ may also be necessary on certain models. Always consult a service manual for vehicle-specific details.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 16257125 and interchanges with several others. It is guaranteed to fit the following vehicles:
- ASTRO 2000 (LH dash)
- BLAZER S10/JIMMY S15 1998-2000 (center dash)
- BRAVADA 1998 (center dash, w/ opt ZN4)
- ISUZU HOMBRE 1999-2000 (LH dash)
- S10/S15/SONOMA 1998-2000 (center dash)
- SAFARI (GMC) 2000 (LH dash)
- SIERRA 1500 PICKUP 1999-2000 (LH dash)
- SIERRA 2500 PICKUP 1999-2000 (LH dash)
- SILVERADO 1500 PICKUP 1999-2000 (LH dash)
- SILVERADO 2500 PICKUP 1999-2000 (LH dash)
How does the VIN programming work?
How does the VIN programming work?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). Our technicians use this VIN to load the correct, vehicle-specific software and calibrations from GM onto the BCM. This ensures it communicates perfectly with your truck’s other modules right out of the box.
Is this a difficult part for a DIYer to install?
For someone with basic mechanical skills, the physical replacement is straightforward. The main challenge is typically accessing the module’s location within the dash. Since our module comes pre-programmed, you avoid the most difficult step, which is software flashing. This makes it a very manageable DIY job.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module, which saves you the time and expense of return shipping.
What if my airbag light comes on after installation?
This is a possibility. The BCM and the airbag system (SDM) are linked for security. If the light appears, it means they need to be re-synced. This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Most local repair shops can perform this service.
How do I know if this BCM will fit my truck?
This module replaces multiple part numbers, including 191583625, 16257125, and 19153625. Please check the fitment list on this page. If your vehicle’s year, make, and model are listed, this is the correct part for you. The VIN you provide ensures we program it perfectly for your specific options.