Are you chasing down bizarre electrical gremlins in your 2015 Corvette or another GM vehicle? One minute the power windows work, the next they don’t. The security light flashes for no reason, or worse, the car won’t start at all. As a technician with over two decades in the bay, I’ve seen these frustrating symptoms hundreds of times, and they almost always point to one culprit: a failing Body Control Module (BCM).
The BCM is the central command center for your vehicle’s body electronics. It manages everything from your interior lights and power locks to the instrument cluster and security system. When it starts to fail, it can create a cascade of seemingly unrelated problems that are a nightmare to diagnose. Dealerships will often quote you a fortune for a new module plus hours of labor for programming. Our solution bypasses that completely.
We offer a straightforward and reliable mail-in programming service. You simply send us your original BCM, and we transfer all the critical, vehicle-specific data—including VIN, mileage, and key information—to this fully tested replacement module. The result is a true plug-and-play solution. No expensive dealer visits, no special scan tools required. You get a module that is ready to install right out of the box, restoring your vehicle’s full functionality.
A Technician’s Notebook: The Phantom Electrical Drain
I remember a 2015 Sierra 1500 that came into the shop with a battery that would be dead every morning. The owner had already replaced the battery and alternator. We performed a parasitic draw test and found a significant drain, but it was intermittent. After hours of tracing circuits, we noticed the interior dome light would flicker faintly long after the doors were shut. The scan tool showed a U0140 code (Lost Communication with BCM). It turned out the BCM was failing internally, keeping certain networks awake and slowly killing the battery. A cloned BCM from us solved the issue in one shot, saving the customer from replacing more unnecessary parts.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic instrument cluster behavior, with gauges dropping out or warning lights flashing.
- ✔ Malfunctioning interior or exterior lighting (e.g., dome lights stay on, headlights won’t turn off).
- ✔ A security system that prevents the vehicle from starting.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or U0100.
- ✔ Horn honking unexpectedly or not working at all.
Your Simple Mail-In and Reinstallation Process
- ✔ Place Your Order: Complete your purchase online. We will contact you with clear, step-by-step shipping instructions.
- ✔ Remove Your Original BCM: Carefully disconnect the negative battery terminal. Locate and remove your vehicle’s original BCM. Its location varies by model (see fitment list below).
- ✔ Ship Us Your Module: Securely package your original BCM and ship it to us using the provided address.
- ✔ We Handle the Programming: Upon receipt, our experts will clone all essential data to the replacement module within 1-2 business days.
- ✔ Install and Drive: We ship your new, plug-and-play BCM back to you. Simply reinstall it, reconnect the battery, and you’re back on the road!
Important Post-Installation Notes
While our goal is a 100% plug-and-play experience, some modern GM vehicles have highly integrated safety systems. Please be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is on after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure may be needed. This requires a professional-grade scan tool to sync 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 correct brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified professional if you are unsure about any step of the process.
Verified Vehicle Compatibility
This module is a direct replacement for part number 13587704 and is interchangeable with part numbers 13592137, 13506935, 13506936, and 13594764. Please verify your original part number before ordering. This BCM fits a wide range of GM vehicles:
- ATS: 2015, 2016 (on firewall)
- Corvette: 2015 (LH dash)
- CTS: 2015 (Sdn, LH dash), 2016 (LH dash)
- Escalade / Escalade ESV: 2015 (under steering column, w/ opt AVF)
- Impala: 2015-2016 (New Style, LH dash)
- Sierra 1500 / Denali 1500: 2015 (under steering column)
- Sierra 2500 / 3500 & Denali 2500 / 3500: 2015 (under steering column or LH firewall)
- Silverado 1500 / 2500 / 3500: 2015 (under steering column)
- Sonic: 2015-2018 (RH rear quarter panel)
- Suburban 1500: 2015 (under steering column, w/ opt AVF)
- Tahoe: 2015 (under steering column, w/ opt AVF)
- XTS: 2015 (left front hinge pillar)
- Yukon / Yukon XL 1500: 2015 (under steering column, w/ opt AVF)
Frequently Asked Questions
How does the mail-in programming service work?
After you place your order, you’ll ship your original BCM to us. We extract the unique data from your module and flash it onto the replacement unit. This makes the new module an exact electronic copy of your old one, ensuring seamless compatibility.
What is the turnaround time?
We typically complete the programming service and ship the replacement module back to you within 24-48 hours of receiving your original BCM.
Do I need to send my keys?
No. Because we are cloning your original module’s data, all of your existing key information is transferred over. Your current keys will work immediately upon installation.
Is this a guaranteed fix for my vehicle’s problems?
This service corrects issues directly caused by a faulty BCM. While the symptoms listed are strong indicators, we always recommend a proper diagnosis by a qualified mechanic to confirm the BCM is the root cause before purchasing.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM is not communicating with the vehicle, we can still extract the necessary data directly from the memory chip. Please contact us if you have concerns about the condition of your module.
Is there a core charge?
No, there is no core charge. You can keep your original module after the service is complete.