Tired of Chasing Electrical Gremlins in Your GM Truck?
As a technician with over two decades of experience, I’ve seen it all when it comes to bizarre electrical issues. Flickering lights, power windows with a mind of their own, a security light that won’t turn off—these aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to go, it can make your reliable truck feel haunted. This is especially true for the 2001 Blazer S10 BCM, a part I’ve diagnosed and replaced countless times.
Instead of spending a fortune at the dealership for diagnostics and programming, we offer a direct, reliable solution. This Body Control Module, compatible with part number 9385236, arrives at your door pre-programmed with the latest GM software updates. All we need is your vehicle’s VIN to flash the module specifically for your truck. This eliminates the need for expensive scan tools and dealer visits, putting the power back in your hands.
A Technician’s Notebook: The Intermittent No-Start
I once had a 2001 GMC Jimmy S15 in my bay that was driving the owner crazy. It would randomly refuse to start, but only sometimes. The battery was good, the starter was new, but the security light would flash, engaging the anti-theft system. After hours of chasing wires, the diagnostics pointed to an internal BCM failure. The module was intermittently losing communication with the key’s security chip. We swapped in a pre-programmed BCM, and the problem vanished instantly. It’s a perfect example of how a faulty 2001 Blazer S10 BCM can mimic other, more expensive problems.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors operating intermittently.
- ✔ The security or anti-theft light staying on, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Communication error codes, such as U-series codes (e.g., U0140), stored in the vehicle’s computer system.
- ✔ Wipers turning on by themselves or not responding to the switch.
DIY Installation: A Straightforward Guide to Your BCM Replacement
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On the 2001 Blazer S10/Jimmy S15 and Sonoma, the BCM is located behind the glove box or in the center dash area. For full-size trucks like the Silverado or Tahoe, it’s typically found on the driver’s side, under the dashboard.
- ✔ 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 Module: Mount your new, pre-programmed BCM in the same location. Firmly reconnect all electrical connectors, ensuring they click into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, wipers, locks, windows—to ensure proper operation.
Important Post-Installation Steps
While our programming handles the heavy lifting, some vehicles may require a simple relearn procedure. If your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, some models may require a Brake Pedal Position sensor recalibration to ensure proper brake light and traction control functionality. Always consult a service manual for your specific vehicle’s requirements.
Will This Fit My Vehicle?
This module is a direct fit for numerous GM vehicles. Please verify your part number (9385236, 19208539, or 9371990) and check the list below. This is a reliable fix for your 2001 Blazer S10 BCM and many other models.
- ASTRO 01: Body Control (BCM); (LH dash)
- BLAZER S10/JIMMY S15 01: Body Control (BCM); (center dash), ID 9385236
- BRAVADA 01: Body Control (BCM); (center dash)
- S10/S15/SONOMA 01: Body Control (BCM); (center dash)
- SAFARI (GMC) 01: Body Control (BCM); (LH dash)
- SIERRA 1500 PICKUP 00: Body Control (BCM); (LH dash), ID 9371990 or 9385236
- SIERRA 2500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236
- SILVERADO 1500 PICKUP 00: Body Control (BCM); (LH dash), ID 9371990 or 9385236
- SILVERADO 2500 PICKUP 00: Body Control (BCM); (LH dash), ID 9385236
- SUBURBAN 1500/2500 00: Body Control (BCM); (LH dash), ID 9385236
- TAHOE 00: Body Control (BCM); (LH dash), ID 9385236
- YUKON 00: Body Control (BCM); exc. Denali; (LH dash), ID 9385236
- YUKON XL 1500/2500 00: Body Control (BCM); (LH dash), ID 9385236
Frequently Asked Questions
Why do you need my VIN?
We require your Vehicle Identification Number (VIN) to program the BCM with the correct software and vehicle-specific options from GM. This ensures it communicates properly with your truck’s other modules right out of the box.
Is this a plug-and-play part?
Yes, for most vehicles. Because we pre-program it to your VIN, you can typically install it without needing a trip to the dealer. However, as noted, some vehicles may require a simple airbag or brake sensor relearn procedure with a scan tool if related warning lights appear.
Do I have to send my old BCM back?
No. This purchase does not require a core return. You can keep your original module.
What if my original part number is 19208539 or 9371990?
This module is a fully compatible replacement for service numbers 19208539, 9371990, and 9385236. It will function identically once programmed for your vehicle.
Where is the BCM located on my 2001 S10 Blazer?
On the 2001 S10 Blazer, Jimmy, and Sonoma models, the Body Control Module is typically found behind the passenger-side dashboard, often accessible by removing the glove box compartment.