Tired of Chasing Electrical Gremlins in Your GM Vehicle?
If your 2015-2019 Chevrolet Sonic or other compatible GM vehicle is suddenly possessed—with flickering lights, malfunctioning power windows or locks, a dead key fob, or strange warning messages lighting up the dash—you’re likely dealing with a failing Body Control Module (BCM). As the central nervous system for your car’s electronics, when the BCM goes bad, it can cause a cascade of frustrating and seemingly unrelated problems. The dealership solution involves a brand-new module and several hundred dollars in programming fees. We offer a smarter, more affordable path back to reliability.
This is a comprehensive cloning service for your BCM. Simply send us your vehicle’s original module, and we will transfer all the critical data—including VIN, mileage, and security information—to this fully tested replacement unit. When you receive it back, it’s a true plug-and-play solution. No expensive trips to the dealer, no complicated programming tools needed. You get a reliable fix that restores your vehicle’s functions without the hassle.
A Technician’s Notebook
I remember a 2017 Sonic that came into the shop with a truly bizarre set of symptoms. The customer said the radio would turn on by itself, the driver-side window wouldn’t go down, and the anti-theft light would flash randomly, sometimes preventing the car from starting. They had already replaced the battery and checked fuses. After hooking up the scan tool, I saw a slew of ‘U’ codes (communication errors) pointing to a network problem. Instead of a bad wire, the culprit was the BCM itself. Internal corrosion, a common issue, was causing it to short-circuit and send erratic signals across the CAN bus network. By cloning his original BCM data to a quality replacement, we had him back on the road the next day with all issues resolved—no dealership required.
Is Your Vehicle Showing These Telltale Signs?
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The key fob has stopped working, even with a new battery.
- ✔ Your vehicle’s security system engages randomly, causing a no-start condition.
- ✔ Multiple, unrelated warning lights appearing on the instrument cluster.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0100, U0140, or other U-series codes.
- ✔ Wipers or horn activating on their own.
A Straightforward Guide to Installation
- ✔ Safety First: Before you begin, disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to discharge.
- ✔ Locate the BCM: On the 2015-2018 Chevrolet Sonic, the Body Control Module is located behind the trim panel in the right-hand (passenger side) rear quarter panel area. For other models, its location varies (see fitment list for common spots like under the steering column or on the firewall).
- ✔ Remove the Old Module: Carefully unplug the electrical connectors from the BCM. They have locking tabs that must be depressed to release. Once disconnected, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the replacement BCM into the mounting bracket and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- ✔ Reconnect and Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Start the vehicle and test all body functions—windows, locks, lights, wipers, and radio—to ensure everything is working correctly.
Important Post-Installation Notes
While this module arrives ready for installation, some vehicle systems may require a recalibration or ‘handshake’ procedure after the BCM is replaced. This is normal. Common procedures include:
- 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 new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure proper brake light and traction control operation.
Always consult a factory service manual or a qualified technician if you are unsure about any post-installation steps.
Verified Vehicle Compatibility
This programming service and module are compatible with a wide range of GM vehicles. It is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. Please verify your part number and check the list below. Location is noted in parentheses.
- 2015-2018 Chevrolet Sonic (RH rear quarter panel)
- 2015-2016 Cadillac ATS (On firewall)
- 2015-2016 Cadillac CTS (LH dash)
- 2015 Cadillac XTS (Left front hinge pillar)
- 2015 Chevrolet Corvette (LH dash)
- 2015-2016 Chevrolet Impala (New Style, LH dash)
- 2015 Chevrolet Silverado 1500 / 2500 / 3500 (Under steering column)
- 2015 Chevrolet Suburban 1500 (Under steering column)
- 2015 Chevrolet Tahoe (Under steering column)
- 2015 GMC Sierra 1500 / 2500 / 3500 (Under steering column or LH firewall)
- 2015 GMC Sierra Denali 1500 / 2500 / 3500 (Under steering column)
- 2015 GMC Yukon & Yukon XL 1500 (Under steering column)
- 2015 Cadillac Escalade & Escalade ESV (Under steering column)
Frequently Asked Questions
How does the cloning service work?
After you purchase, we will contact you with simple instructions to ship your original BCM to our facility. Once we receive it, our technicians will extract the unique programming and transfer it to the replacement module. We then ship the ready-to-install BCM back to you.
Do I need to send my key or any other parts?
No, we only need your original Body Control Module. All the necessary security and key data is stored within the BCM itself, which is what we transfer.
How long does the process take?
We typically complete the programming and ship the replacement module back out within 1-2 business days of receiving your original BCM. You will receive a tracking number as soon as it ships.
What if my original BCM is too damaged to be read?
In most cases, even with significant internal failure, we can still retrieve the necessary data. In the rare event that your module is completely unreadable, we will contact you to discuss options, which may include a full refund.
Is this a guaranteed fix for my vehicle’s problems?
This service corrects issues directly caused by a faulty BCM. While a failing BCM is a very common cause for the symptoms listed, proper vehicle diagnosis is always recommended to rule out other potential issues like wiring or sensor faults.
Do I have to pay a core charge?
No, there is no core charge for this service. You can keep your original, non-working module.