If you’re dealing with baffling electrical issues in your 2001 Chevy Blazer, GMC Jimmy, or S10, you’ve come to the right place. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of constant frustration. This isn’t just a part; it’s the solution to get your vehicle’s essential functions working correctly again.
This BCM is the nerve center for your vehicle’s body electronics. When it starts to fail, the symptoms can seem random and unrelated. We eliminate the biggest hurdle in BCM replacement: the programming. Simply provide us with your vehicle’s VIN during checkout, and our experts will program the module with the latest GM software specifically for your truck. It arrives at your door ready to be installed, saving you a costly trip to the dealership and hours of diagnostic headaches.
From the Diagnostic Bay: The Case of the Haunted S10
I remember a 2001 S10 that came into my shop with a list of complaints that sounded like a prank. The dome light would stay on, the radio presets would vanish, the power locks worked only when they wanted to, and the security light was always on, causing intermittent no-starts. The owner had already replaced the battery twice. After checking the basics, my scanner pointed to a communication breakdown originating from the BCM. Once we installed a properly programmed module like this one, every single issue disappeared. It’s a classic failure pattern for these vehicles, and this is the definitive fix.
Is Your Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution:
- âś” Erratic or non-functional power windows, door locks, and mirrors.
- âś” Interior lights or headlights staying on or not working at all.
- âś” The ‘Security’ or ‘Passlock’ light is illuminated on the dash, causing a no-start condition.
- âś” Unexplained battery drain that leaves you with a dead battery overnight.
- âś” Gauges on the instrument cluster behaving erratically or not working.
- âś” Diagnostic trouble codes (DTCs) related to lost communication, such as U1000.
A Straightforward Guide to Your BCM Installation
For the 2001 Blazer S10 and Jimmy S15, this is a very manageable job for a DIYer. The BCM is typically located behind the right side of the dashboard (center dash area).
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the Module: On your Blazer/Jimmy/S10, access the BCM by removing the trim panel on the passenger side of the center console. It’s a black box with several electrical connectors.
- Swap the BCM: Carefully unplug the wiring harnesses from the old module. Unbolt it from its bracket, then install the new, pre-programmed module in its place.
- Reconnect and Test: Securely plug all wiring harnesses into the new BCM. Reconnect your battery terminal and start the vehicle. Test all functions like windows, locks, and lights.
Important Post-Installation Note: In some cases, additional steps may be required. If your airbag light comes on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key’ procedure. A ‘Brake Pedal Position Relearn’ may also be necessary for proper brake light and traction control operation. Always refer to a service manual for your specific vehicle if you are unsure.
Verified Vehicle Compatibility
This Body Control Module is a direct-fit replacement for the following vehicles. Please match your part number (09385236, 19208539, or 9371990) to ensure compatibility.
- BLAZER S10/JIMMY S15 (2001) – (center dash), ID 9385236
- S10/S15/SONOMA (2001) – (center dash)
- BRAVADA (2001) – (center dash)
- ASTRO / SAFARI (GMC) (2001) – (LH dash)
- SILVERADO 1500/2500 PICKUP (2000) – (LH dash), ID 9371990 or 9385236
- SIERRA 1500/2500 PICKUP (2000) – (LH dash), ID 9371990 or 9385236
- TAHOE / YUKON (2000) – (LH dash), ID 9385236
- SUBURBAN 1500/2500 (2000) – (LH dash), ID 9385236
- YUKON XL 1500/2500 (2000) – (LH dash), ID 9385236
Your Questions, Answered by an Expert
Frequently Asked Questions
Do I need to program this BCM?
No. We handle all the programming for you before shipment. Just provide your vehicle’s 17-digit VIN when you order, and it will arrive ready to install with the latest GM software.
Where is the BCM located on my 2001 Blazer S10?
On the 2001 Blazer S10, Jimmy S15, and Sonoma models, the Body Control Module is located behind the dashboard on the passenger side of the center console area, often accessible by removing the passenger-side hush panel.
Will this fix my ‘Security’ light and no-start problem?
Yes, in most cases. The BCM is an integral part of the GM Passlock security system. A failing BCM is a very common cause for an illuminated security light and the resulting crank-no-start condition. This module is programmed to work with your existing security components.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM and the airbag’s Sensing and Diagnostic Module (SDM) need to be electronically synced. This requires a professional-grade scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. It’s a quick process for any qualified mechanic.
Do I have to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.