Is Your Chevy S10 Blazer or GMC S15 Jimmy Plagued by Electrical Gremlins?
If you’re dealing with a frustrating array of electrical issues in your 2001 Blazer, Jimmy, or other compatible GM truck, a failing Body Control Module (BCM) is the most likely culprit. The BCM is the central command center for your vehicle’s body electronics. When it begins to fail, it can cause unpredictable and maddening problems that seem to have no rhyme or reason. From power windows that won’t cooperate to a security system that acts on its own, a faulty BCM can make your reliable truck feel possessed. This isn’t just an inconvenience; it can affect the safety and security of your vehicle.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights staying on or not turning on at all.
- ✔ The security system or anti-theft light flashing, preventing the vehicle from starting.
- ✔ Intermittent or complete failure of the radio and instrument cluster gauges.
- ✔ Horn honking unexpectedly or not working when needed.
- ✔ Inaccurate readings on the driver information center.
- ✔ Parasitic battery drain that leaves you with a dead battery overnight.
The Direct Solution: A VIN-Programmed 2001 Blazer S10 BCM
Don’t let a faulty module keep your truck off the road. This Body Control Module is a direct-fit replacement, solving these complex electrical issues. The critical advantage of our service is that we program the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives ready for a straightforward installation, loaded with the latest GM software updates to ensure optimal performance and communication with your vehicle’s other electronic systems. You get a component that is truly plug-and-play, eliminating the need for an expensive trip to the dealership for programming.
This module is a reliable replacement for service numbers 19208539, 9371990, and 9385236. Plus, there is no core charge, so you can keep your original module without the hassle of sending it back.
Installation and Post-Install Procedures
Installation is typically straightforward, involving locating the old BCM (often under the center or driver’s side dash), disconnecting the battery, swapping the electrical connectors, and mounting the new module. However, on these specific GM models, a couple of additional steps, known as relearn procedures, may be necessary after the new BCM is installed.
- Airbag System Sync: If you notice the airbag warning light is illuminated after installation, it’s not a cause for alarm. The new BCM simply needs to be synchronized with the airbag’s SDM (Sensing and Diagnostic Module). A professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the light.
- Brake Pedal Position Relearn: In some cases, the brake pedal position sensor may need to be recalibrated. This ensures your brake lights function correctly and that systems like traction control operate as designed. This procedure can also be completed with a compatible diagnostic tool.
Always consult a factory service manual or a qualified technician if you are unsure about any part of the installation process.
Frequently Asked Questions
What does the Body Control Module (BCM) do on my 2001 Blazer?
The BCM acts as the central computer for your truck’s body electronics. It controls non-engine related functions like power windows, door locks, interior/exterior lights, the security system, wipers, and the radio.
Is this part ready to install when I receive it?
Yes! This BCM is programmed to your vehicle’s VIN before we ship it. This ensures it communicates correctly with your truck’s existing systems. Please provide your VIN at checkout to complete the programming.
What if my airbag light is on after installing the new BCM?
This is a common occurrence. It means the new BCM needs to be synced with the airbag module. A technician with a professional scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to turn off the light.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
Will this fix my truck not starting?
If your no-start issue is caused by the factory anti-theft system (Passlock) being triggered by a faulty BCM, then yes, this programmed module will resolve the problem.