Are you chasing electrical gremlins in your 2001 Chevrolet Blazer S10 or GMC Jimmy S15? Flickering lights, malfunctioning power windows, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a host of frustrating and unpredictable problems. This isn’t just an inconvenience; it can affect safety systems and your vehicle’s reliability. Stop throwing parts at the problem and get the definitive solution.
This is a direct-fit replacement Body Control Module, part number 19208539, that arrives at your doorstep fully programmed to your vehicle’s specific VIN. We handle all the complex flashing with the latest GM software updates before it ships. This means no expensive trips to the dealership for programming—a huge saving in both time and money. Just install it, perform any necessary relearn procedures, and get your truck’s features working correctly again.
Case Study: A Tricky Diagnosis
I remember a 2001 S10 that came into my shop a few years back. The owner was at his wit’s end. One day the radio wouldn’t turn off even with the key out, the next the dome light would stay on, draining the battery. He’d already replaced the battery and checked all the fuses. We hooked up the scanner and saw a flood of communication error codes. These intermittent, seemingly unrelated issues are textbook symptoms of a BCM failure. The internal circuits and relays begin to break down, sending faulty signals across the vehicle. We installed a VIN-programmed BCM, and like magic, all the electrical ghosts vanished. It’s a powerful reminder of how this single module governs so much of your daily driving experience.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution for your 2001 Blazer S10 BCM issues:
- ✔ Erratic or non-working power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security or anti-theft system light is on, preventing the engine from starting.
- ✔ Wipers operating intermittently or not parking in the correct position.
- ✔ Instrument panel gauges behaving erratically.
- ✔ Communication-related Diagnostic Trouble Codes (DTCs) stored in the system.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a confident DIYer. While the exact location can vary slightly, 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 starting any electrical work.
- Locate the BCM: On the 2001 S10/Blazer/Jimmy, the BCM is located in the center of the dash, often accessible by removing the lower dash panels or glove box.
- Disconnect and Remove: Carefully unplug the electrical connectors. 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 and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect Battery & Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, wipers, etc.
Post-Installation Procedures: What to Expect
Because this module is central to many systems, some vehicles may require a couple of simple synchronization steps after installation. This is normal.
- ✔ Airbag System Sync: If your airbag warning light illuminates after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This syncs the new BCM with the airbag system and requires a professional-grade scan tool.
- ✔ Brake Pedal Position Relearn: Some models may require this recalibration to ensure the brake lights and traction control system function properly. This can often be done with a capable bidirectional scan tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 19208539, 9371990, and 9385236. It is guaranteed to fit the following vehicles:
- 2001 BLAZER S10/JIMMY S15 (Center Dash)
- 2001 S10/S15/SONOMA (Center Dash)
- 2001 BRAVADA (Center Dash)
- 2001 ASTRO / SAFARI (GMC) (LH Dash)
- 2000 SILVERADO / SIERRA 1500 & 2500 PICKUP (LH Dash)
- 2000 SUBURBAN 1500 & 2500 (LH Dash)
- 2000 TAHOE / YUKON (LH Dash)
- 2000 YUKON XL 1500 & 2500 (LH Dash)
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, the security system, and more.
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and calibrations for your specific model, year, and options. This ensures it works correctly right out of the box without needing a dealer to program it.
Is this a difficult part to install myself?
For someone with basic mechanical skills, it’s very manageable. The main challenge is accessing the module, which is typically located under the dashboard. No special tools are needed for the physical installation, but be aware that some post-install electronic relearn procedures may be necessary.
Do I have to return my old BCM?
No. This purchase comes with no core charge. You can keep your original module.
What if the airbag light is on after I install it?
This is a known possibility. It simply means the new BCM needs to be electronically introduced to the airbag system (SDM). A repair shop with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.