Tired of Chasing Electrical Gremlins in Your GM Truck?
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. If you’re dealing with flickering lights, a security system that has a mind of its own, or power accessories that work intermittently, the BCM is the likely culprit. It’s the central command center for your vehicle’s body electronics, and when it starts to fail, the symptoms can be maddeningly inconsistent. This isn’t just an annoyance; it can be a safety issue when exterior lights or security features don’t work as they should.
This is a direct-fit replacement Body Control Module for a wide range of GM vehicles, including the 2001 Blazer S10 BCM. The best part? We take the biggest headache out of the equation. Simply provide your vehicle’s VIN at checkout, and our experts will program the module with the latest GM factory software specifically for your truck. This means no expensive trip to the dealership for programming. It arrives at your door ready to install, saving you time and money.
A Technician’s Notebook: The Intermittent No-Start
I remember a 2001 Jimmy S15 that came into the shop with a classic BCM failure symptom: an intermittent no-start condition. The owner had already replaced the battery and starter. The security light would flash randomly, and the Passlock system would engage, preventing the engine from cranking. After confirming power and grounds to the BCM were good, we diagnosed a faulty module. Instead of towing it to a dealer, we installed one of our pre-programmed BCMs. The entire job took less than an hour in the bay, the security system reset perfectly, and the customer drove away with a reliable truck again. This is the exact fix for that kind of problem.
Is Your GM Truck Showing These Symptoms?
- ✔ Erratic or non-functional interior dome lights, dash lights, or headlights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft light staying on, causing a no-start or no-crank condition.
- ✔ False warnings on the driver information center (e.g., “door ajar”).
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U-series codes, stored in the system.
- ✔ Inconsistent operation of the radio or climate controls.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system capacitors to discharge.
- ✔ Locate the BCM: On the 2001 Blazer S10/Jimmy S15, the BCM is typically located behind the right side of the center dash, accessible after removing the glove box or lower dash trim panels. For full-size trucks and vans, it’s often on the left-hand side of the dash.
- ✔ Disconnect and Remove: Carefully 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 plug in all the electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, and radio—to ensure proper operation.
- ✔ Perform Relearns (If Needed): In some cases, you may need to perform additional procedures. If the airbag light is on, an “Airbag System Sync” is required. A “Brake Pedal Position Relearn” may also be necessary for proper brake light and traction control function. These procedures typically require a professional-grade scan tool.
Will This Fit My Vehicle?
This module is a direct replacement for service numbers 19208539, 9371990, and 9385236. It is guaranteed to fit the following models and options:
- 2001 ASTRO: Body Control (BCM); (LH dash)
- 2001 BLAZER S10/JIMMY S15: Body Control (BCM); (center dash), ID 9385236
- 2001 BRAVADA: Body Control (BCM); (center dash)
- 2001 S10/S15/SONOMA: Body Control (BCM); (center dash)
- 2001 SAFARI (GMC): Body Control (BCM); (LH dash)
- 2000 SILVERADO/SIERRA 1500 PICKUP: Body Control (BCM); (LH dash), ID 9371990 or 9385236
- 2000 SILVERADO/SIERRA 2500 PICKUP: Body Control (BCM); (LH dash), ID 9385236
- 2000 SUBURBAN 1500/2500: Body Control (BCM); (LH dash), ID 9385236
- 2000 TAHOE: Body Control (BCM); (LH dash), ID 9385236
- 2000 YUKON: Body Control (BCM); exc. Denali; (LH dash), ID 9385236
- 2000 YUKON XL 1500/2500: Body Control (BCM); (LH dash), ID 9385236
Frequently Asked Questions
Do I need to send my old BCM back?
No. We do not require a core return for this part. You can keep your original module, which eliminates core charges and return shipping hassles.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as we program the module specifically for your vehicle.
What tools are needed for the post-installation procedures?
If your vehicle requires an Airbag System Sync or Brake Pedal Position Relearn, these procedures must be performed with a bi-directional professional diagnostic scan tool. Basic code readers cannot perform these functions.
Is this BCM a guaranteed fix for my problem?
This module will fix issues directly caused by a faulty BCM. However, it’s crucial to properly diagnose the problem first, as similar symptoms can be caused by wiring issues, bad grounds, or other faulty components.
What happens if I install it and the airbag light comes on?
This is a known possibility. The new BCM needs to be synced with the vehicle’s airbag module (SDM). A procedure called “Setup SDM Primary Key in BCM” must be performed with a compatible scan tool to resolve this and turn off the light.