Restore Your Truck’s Functionality and Peace of Mind
As a technician with over two decades of experience, I’ve seen it all when it comes to vehicle electronics. If your 2015 Sierra 2500, or another compatible GM vehicle, is plagued by bizarre electrical issues—flickering lights, malfunctioning power windows, a temperamental security system, or even a no-start condition—a failing Body Control Module (BCM) is often the culprit. The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can feel like your truck has a mind of its own. Dealerships will quote you a fortune for a new module and the mandatory programming. We offer a smarter, more affordable path forward.
This is not just a part; it’s a comprehensive solution. We provide a fully tested replacement BCM that is programmed specifically for your vehicle using the data from your original module. This cloning process ensures that all your truck’s original features, from keyless entry to specific lighting packages, work perfectly right out of the box. You simply send us your old BCM, we handle the complex data transfer, and ship you back a plug-and-play replacement. It’s the most reliable way to get your truck back to 100% without the dealership hassle.
Is Your GM Vehicle Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ The security system light is flashing, and the engine won’t crank (anti-theft active).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Intermittent warning lights on the dashboard with no other apparent cause.
- ✔ Communication error codes stored, such as U0140, U0155, or other ‘U’ series codes indicating loss of communication with the BCM.
A Technician’s Notebook: The Case of the Haunted Sierra
I once had a 2015 Sierra 2500 in my bay that was driving the owner crazy. The main complaint was a dead battery every few days. He’d already replaced the battery and alternator. After connecting my diagnostic tool, I found no obvious parasitic draw. However, I noticed the instrument cluster backlight would flicker faintly long after the truck was shut off. Digging deeper, I found communication faults between various modules, all pointing to the BCM. The BCM wasn’t fully going to ‘sleep,’ causing a small but persistent power drain that killed the battery over time. A cloned BCM from a service just like this one solved the issue completely, saving the customer hundreds compared to the dealership’s quote. It’s a classic example of how a failing BCM can manifest in indirect ways.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- ✔ Locate the BCM: On most GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, often near the steering column or against the firewall. On cars like the CTS or Impala, it may be in the LH dash area or on a hinge pillar. A quick search for your specific model can confirm the exact location.
- ✔ Remove Trim Panels: You may need to remove a lower dash panel or knee bolster to gain access. These are typically held in by a few clips or screws.
- ✔ Disconnect and Remove: Carefully disconnect the multiple wiring harness connectors from the BCM. They have locking tabs that need to be depressed. Once all connectors are free, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the replacement BCM into the mounting bracket and securely connect all wiring harnesses. You’ll 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—lights, locks, windows, wipers, etc.—to confirm proper operation.
Important Post-Installation Notes
While our programming makes this a plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. This is normal and can sometimes be required.
- Airbag System Sync: If your airbag/SRS light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure correct brake light operation and to prevent issues with the traction control system.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM programming service is compatible with a wide range of General Motors vehicles. Please verify your part number is listed (13594692, 13594768, 13593214, 13580690, 13591519, or 13594769) and check the list below. This list is a guide; matching the part number is the most accurate way to ensure compatibility.
- ✔ Cadillac: ATS (2014), CTS (2014), Escalade/ESV (2015), XTS (2014)
- ✔ Chevrolet: Caprice/SS Caprice (2014-17), Corvette (2014), Impala (2015-19), Silverado 1500 (2014), Silverado 2500/3500 (2015), Suburban 1500 (2015), Tahoe (2015)
- ✔ GMC: Sierra 1500/Denali 1500 (2014), Sierra 2500/3500 & Denali 2500/3500 (2015), Yukon/Yukon XL 1500 (2015)
Frequently Asked Questions
Frequently Asked Questions
How does the mail-in programming service work?
After you place your order, we will contact you with detailed instructions to ship your original BCM to our facility. Once we receive it, our technicians will clone the data to a replacement module and ship it back to you, typically within 1-2 business days.
Do I need to send my keys or other modules?
No, we only need your original Body Control Module. The cloning process transfers all the necessary key and security information, so your existing keys will work perfectly.
Is this a guaranteed fix for my vehicle’s problems?
This service corrects issues directly caused by a faulty BCM. While the symptoms we’ve listed are common indicators, we always recommend a proper diagnosis by a qualified mechanic to confirm the BCM is the root cause before ordering.
What if my part number is slightly different?
This module is a direct replacement for several part numbers, including 13594692, 13594768, 13593214, and others listed. As long as your part number is on our compatibility list, this service will work for you.
What is a core charge? Do I have to pay one?
There is absolutely no core charge for this service. You are welcome to keep your original, non-working module.