Are you chasing down bizarre electrical problems in your 2001 Chevrolet Blazer, S10, GMC Jimmy, or Sonoma? One minute the power windows work, the next they don’t. The security light is flashing, the gauges are acting erratically, or worse, the truck won’t start at all. As a technician with over two decades of experience, I can tell you these phantom issues often point directly to one component: a failing Body Control Module (BCM).
This isn’t just a replacement part; it’s a direct solution. We provide a high-quality BCM, service number 19208539, that arrives at your doorstep pre-programmed to your vehicle’s specific VIN. We flash it with the latest GM factory software, ensuring all systems communicate correctly and any original software bugs are resolved. This eliminates the need for an expensive trip to the dealership for programming, saving you time and money. Simply provide your VIN at checkout, and we handle the rest.
From the Diagnostic Bay: The Intermittent No-Start
I remember a 2001 GMC Jimmy S15 that was towed into my shop. The owner was at his wit’s end. It would start fine for a week, then refuse to crank for two days, only to start again like nothing was wrong. The battery was new, the starter checked out, but the security light was always on during the no-start episodes. A scan showed communication loss codes with the BCM. A failing BCM was preventing the Passlock security system from validating the key, creating a frustrating and intermittent no-start condition. Replacing the faulty module with a correctly programmed 2001 Blazer S10 BCM solved the problem permanently.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-functional interior lights, headlights, or tail lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Gauges on the instrument cluster sweeping, freezing, or not working.
- ✔ False warning lights appearing on the dashboard.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss, such as U-series codes.
- ✔ Inconsistent horn operation or keyless entry failure.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the Module: On the 2001 Blazer/Jimmy/S10 models, the BCM is typically located in the center of the dash, often accessible by removing the passenger-side lower dash panel or ‘hush panel’.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, remove any bolts or clips holding the module in place.
- ✔ Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. Ensure they click into place.
- ✔ Power Up: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and verify that your lights, locks, and windows are functioning correctly.
Important Post-Installation Steps
This 2001 Blazer S10 BCM is designed for a simple installation, but some GM vehicles require additional synchronization procedures. Please be aware of the following:
- Airbag System Sync: If your airbag warning light illuminates after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the airbag module 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 and traction control operation.
- No Core Required: We do not require you to send your old module back. There is no core charge, which simplifies the process for you.
Verified Vehicle Compatibility
This module is a direct fit for vehicles using service numbers 19208539, 9371990, or 9385236. Please confirm your part number or contact us with your VIN. It fits the following models:
- 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 (exc. Denali) (LH dash)
- 2000 YUKON XL 1500 & 2500 (LH dash)
Frequently Asked Questions
How does the VIN programming work?
After you place your order, simply send us your 17-digit Vehicle Identification Number (VIN). Our technicians will use it to program the BCM with the latest GM software specific to your vehicle’s factory options before we ship it.
Do I need to send my old BCM back?
No. This purchase comes with no core charge. You can keep your original module, making the repair process faster and more convenient for you.
What tools are required for the installation?
Basic hand tools like a socket set and screwdrivers are usually all that’s needed to access and replace the BCM. No special programming tools are required on your end because we handle all the programming.
What if my airbag light comes on after I install it?
This is a known possibility on some GM vehicles. It means the new BCM needs to be electronically ‘introduced’ to the airbag system. A repair shop with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes.
Is this part compatible with other service numbers?
Yes, this module directly replaces parts with service numbers 19208539, 9371990, and 9385236. Matching one of these numbers ensures compatibility.