Restore Your Vehicle’s Electrical Sanity with a Perfectly Matched BCM
Are you chasing electrical gremlins in your Cadillac or Chevrolet? Flickering lights, power windows with a mind of their own, a security system that won’t behave, or a car that refuses to start can all point to one culprit: a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can cause widespread, frustrating issues. In my 20+ years in the shop, I’ve seen how a bad BCM can make a perfectly good car feel unreliable. The dealer solution is often a new module followed by a hefty bill for programming. We offer a smarter, more affordable path forward.
This is not just a replacement part; it’s a comprehensive programming service. We provide a fully functional, tested replacement BCM that is a Cloned Body Control Module from your original unit. This process transfers all your vehicle’s specific data—including VIN, mileage, and key information—onto the replacement module. The result is a true plug-and-play solution that eliminates the need for expensive dealership programming. You simply send us your original BCM, we perform the cloning service, and ship you back a module that is ready for installation right out of the box.
A Technician’s Notebook: The Ghost in the Sonic
A customer brought in a 2014 Chevy Sonic with some of the most bizarre symptoms I’ve seen. The radio would randomly switch stations, the interior dome light would flicker while driving, and occasionally, the horn would blare when they used the turn signal. They had already replaced the battery and checked all the fuses. A standard scan tool showed a dozen intermittent communication codes, including the dreaded U0140 (Lost Communication With Body Control Module). Instead of just throwing parts at it, we pulled the BCM. After seeing these exact symptoms before, I knew the internal logic of the module was failing. By providing a Cloned Body Control Module, we transferred the car’s unique identity to a solid replacement unit. The customer was back on the road in two days, electrical gremlins banished, for a fraction of the dealership’s quote.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, locks, and mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ The security system or keyless entry fails to operate correctly.
- ✔ Dashboard warning lights appearing for no reason (ABS, Airbag, Check Engine).
- ✔ Communication error codes, such as U0140, U0155, or other U-series codes.
- ✔ A no-start or intermittent starting condition where the engine cranks but won’t fire.
A Straightforward Guide to Installation
- ✔ Cloning Process: Once we receive your module, our experts will meticulously transfer all critical data to the replacement BCM. This typically takes 1-2 business days.
- ✔ Safety First: Before installing the replacement BCM, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- ✔ Locate and Replace: Find your old BCM (locations are listed below) and carefully disconnect the wiring harnesses. Remove the module and install the new one in its place, ensuring all connectors are securely fastened.
- ✔ Reconnect Power: Reconnect the negative battery terminal.
- ✔ Post-Install Checks: Start the vehicle and verify that the original issues are resolved. Note the potential need for post-installation procedures listed below.
Verified Vehicle Compatibility
This service is guaranteed to work for the following vehicles with the specified options. Please verify your part number (13589093, 13586589, or 13580689) before ordering.
- 2013 Cadillac ATS: Body Control (BCM); located on the firewall.
- 2013 Cadillac XTS: Body Control (BCM); located on the left front hinge pillar.
- 2013-2014 Chevrolet Sonic: Body Control (BCM); located in the right-hand rear quarter panel.
- 2014 Chevrolet Impala: Body Control (BCM); VIN 1 (4th digit, New Style), located in the left-hand dash area.
Important Post-Installation Information
While our Cloned Body Control Module is designed to be plug-and-play, certain vehicle systems may require a recalibration or sync procedure after the BCM is replaced. This is normal and ensures all related components communicate correctly.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require the brake pedal position sensor to be recalibrated. This is essential for proper brake light operation and traction control system function.
Disclaimer: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Frequently Asked Questions
What is the cloning process?
Cloning is a service where we read the essential software and vehicle-specific data (like VIN and security info) from your original BCM and write it directly onto the replacement module we provide. This makes the new module an exact digital copy of your old one, avoiding the need for dealer programming.
Why do I need to send you my original BCM?
Your original BCM holds the unique data that allows it to communicate with other modules in your specific vehicle. By sending it to us, you enable us to create a true plug-and-play replacement, saving you hundreds in dealership programming fees.
Is there a core charge?
No, there is no core charge for this service. You can keep your original, non-functional module after the service is complete.
How long does the process take?
Once we receive your BCM, the cloning and testing process typically takes 1-2 business days. We will then ship the replacement module back to you and provide tracking information.
What tools are needed for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn procedures require a professional-grade bidirectional diagnostic tool (like a Snap-on, Autel, or GM MDI). Most basic code readers cannot perform these functions.
Will this fix my specific problem?
This module replacement service is a direct solution for a failed BCM. If your vehicle has been properly diagnosed with a faulty BCM causing electrical issues, this service will resolve those problems. It will not fix issues caused by other faulty components or wiring problems.