Restore Your GM Truck’s Electrical System with a Reliable, Programmed BCM
Are you chasing electrical gremlins in your 2001 Chevy Blazer S10 or GMC Jimmy S15? Intermittent power windows, flickering lights, a security light that won’t turn off, or a radio with a mind of its own are all classic signs of a failing Body Control Module (BCM). As the central computer for your vehicle’s body electronics, when the BCM starts to go, it can cause a host of frustrating and unpredictable problems. I’ve seen it hundreds of times in my shop: a perfectly good truck or SUV sidelined by what seems like a complex electrical nightmare, but it’s often just this single component.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer expense out of the equation. Simply provide your vehicle’s VIN during checkout, and our technicians will program this module with the latest GM software specific to your truck. This ensures all factory-installed options work correctly right out of the box. This is the most efficient way to get your 2001 Blazer S10 BCM replaced and your vehicle back to full functionality.
A Technician’s Notebook: The Case of the Haunted S10
A customer brought in his 2001 S10, complaining that his interior lights would randomly turn on while driving, and his power door locks would cycle on their own. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed several communication error codes (U-codes) pointing to the BCM. A visual inspection of the original BCM revealed no obvious water damage, which is a common culprit. However, after years of heat cycles and vibrations, the internal solder joints and micro-relays had simply worn out. Installing a VIN-programmed BCM like this one solved every single one of his issues in under an hour. It’s a common failure, and this is the definitive fix.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome lights or exterior lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, potentially causing a no-start condition.
- ✔ Wipers or radio operating intermittently or incorrectly.
- ✔ False warning messages on the instrument cluster.
- ✔ Communication DTCs like U1000 or other U-series codes stored in various modules.
A Straightforward Guide to Installation
Replacing the 2001 Blazer S10 BCM is a job most DIYers can handle with basic tools. The module is typically located behind the center of the dash.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Access the Module: Carefully remove the necessary dash trim panels to gain access to the BCM. On the S10/Blazer platform, it’s usually mounted in the center dash area.
- Disconnect and Remove: 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 BCM in the same location and securely reconnect all electrical harnesses.
- Reconnect Power: Re-attach the negative battery terminal.
- Verify Operation: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair. Note any post-install procedures that may be required for your specific vehicle.
Important Post-Installation Information
While our programming handles the majority of the setup, some GM vehicles may require additional steps after installation:
- Airbag System Sync: If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade diagnostic tool to sync 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: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified technician for specific procedures related to your vehicle.
Guaranteed Vehicle Compatibility
This module is a direct replacement for part numbers 9385236, 19208539, and 9371990. 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 (LH dash)
- ✔ 2000 Tahoe / Yukon (exc. Denali) (LH dash)
- ✔ 2000 Suburban 1500 / 2500 (LH dash)
- ✔ 2000 Yukon XL 1500 / 2500 (LH dash)
- ✔ 2000 Silverado 1500 / 2500 Pickup (LH dash)
- ✔ 2000 Sierra 1500 / 2500 Pickup (LH dash)
Frequently Asked Questions
Is this BCM really plug-and-play?
Yes! Because we program it to your vehicle’s VIN before shipping, it eliminates the need for a trip to the dealership for programming. In most cases, it’s a simple swap, though some vehicles may require the minor relearn procedures mentioned above.
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.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your order until we receive this information for programming.
What tools are needed for the post-install procedures?
The Airbag System Sync and Brake Pedal Position Relearn require a bi-directional professional scan tool, like a GM Tech 2 or a high-end Snap-on or Autel scanner. Most DIY code readers cannot perform these functions.
How can I be sure the BCM is the problem?
The best way is with a proper diagnosis using a scan tool that can communicate with the BCM. Look for communication error codes (U-codes) or specific BCM-related trouble codes. However, the list of symptoms we provided covers the most common indicators of a failing 2001 Blazer S10 BCM.