Restore Your Truck’s Electrical System with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2015 Sierra 3500 or another compatible GM vehicle, you’re not alone. As a technician with over two decades of experience, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of constant frustration. Flickering lights, malfunctioning power windows, random warning messages, or a vehicle that refuses to start—these are all classic signs that the BCM, the central nervous system for your vehicle’s accessories, is on its way out. Dealerships will quote you a fortune for a new module plus expensive programming fees. We offer a smarter, more affordable solution.
This is a replacement Body Control Module, part number 13594692, that comes fully programmed and ready for installation. How? Through our expert cloning service. Simply purchase this module, and we’ll contact you with instructions to ship your original BCM to our facility. Our technicians will then transfer all of your vehicle’s specific data—including VIN, mileage, and key information—to this replacement unit. The result is a true plug-and-play module. You get your truck back to 100% functionality without any need for a trip to the dealer or a high-end scan tool for programming. It’s the most efficient way to solve your electrical problems for good.
A Technician’s Notebook: The Intermittent Gremlin
I remember a 2015 Silverado 2500 that came into the shop with the owner at his wit’s end. The interior lights would flicker, the radio would sometimes cut out, and occasionally, the driver’s side window wouldn’t respond. He had already replaced the battery and checked the main grounds. The codes were intermittent—mostly U0140 (Lost Communication with BCM). After confirming power and ground to the BCM were solid, we identified the module itself as the culprit. Instead of a costly new unit, we used our cloning service. The customer sent us his module, we cloned it, and sent the replacement back. He installed it in his driveway in under an hour. The gremlins were gone. That’s the power of a correctly programmed module.
Is Your Truck Exhibiting These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s highly likely your BCM is the root cause:
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security or anti-theft system light is on, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Wipers activating on their own or not turning on/off correctly.
- ✔ Diagnostic Trouble Codes (DTCs) related to communication errors, such as U0140, U0155, or B-series codes like B1325.
Your Straightforward BCM Installation Guide
Installing your programmed BCM is a manageable job for a DIY enthusiast. The module is typically located under the driver’s side of the dashboard, near the steering column or left firewall.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes before beginning work.
- Locate the BCM: On most trucks like the 2015 Sierra 3500, you’ll need to remove the lower dash panel beneath the steering wheel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect and Test: Reinstall any trim panels you removed, then reconnect the negative battery terminal. Start the vehicle and test all functions: lights, windows, locks, wipers, etc.
Post-Installation Notes
Our cloning service makes this a nearly seamless swap, but in some GM vehicles, a couple of minor relearn procedures may be needed:
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. This is not always required.
- 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.
Verified Compatibility for Your Vehicle
This BCM is a direct replacement for part number 13594692 and is also compatible with part numbers 13594768, 13593214, 13580690, 13591519, and 13594769. It fits a wide range of GM vehicles. Please verify your part number and check the list below:
- Cadillac ATS: 2014
- Cadillac CTS: 2014 (Sdn, VIN A)
- Cadillac Escalade / ESV: 2015
- Cadillac XTS: 2014
- Chevrolet Caprice / SS Caprice: 2014-2017
- Chevrolet Corvette: 2014
- Chevrolet Impala: 2015-2019 (New Style)
- Chevrolet Silverado 1500/2500/3500: 2014-2015
- Chevrolet Suburban 1500: 2015
- Chevrolet Tahoe: 2015
- GMC Sierra 1500/2500/3500 & Denali Models: 2014-2015
- GMC Yukon / Yukon XL 1500: 2015
Note: Location varies by model (e.g., under steering column, LH firewall, LH dash). Always confirm the ID number on your original module is 13594692 for guaranteed compatibility on applicable models.
Frequently Asked Questions
Disclaimer: Vehicle systems are complex. While we provide this information based on years of experience, always consult a factory service manual or a qualified technician if you are unsure about any part of the diagnostic or repair process.
Frequently Asked Questions
How does the programming service work?
After you place your order, we will contact you with a prepaid shipping label and instructions to send your original BCM to us. Once we receive it, we perform a full data transfer to the replacement module and ship it back to you, typically within 1-2 business days.
Do I need to do any programming myself?
No. Our cloning service makes this a true plug-and-play part. All the critical data from your original module is transferred over, so your vehicle will accept it without needing any dealer programming.
Is there a core charge?
No, there is no core charge or deposit required. You can keep your original module after you’ve sent it to us for the data transfer.
What tools do I need for installation?
Basic hand tools are usually all that’s required, such as a socket set and a trim removal tool to access the module behind the dash panels. No special electronic tools are needed for the installation itself.
What if my airbag light comes on after I install it?
In some cases, the BCM and Supplemental Donning Module (SDM) need to be re-synced. This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be performed by any professional shop with a compatible bi-directional scan tool.
Why is this better than buying a used BCM from a junkyard?
A used BCM from another vehicle will contain the wrong VIN and security information, and your vehicle will not start or operate correctly. It would still require expensive dealership programming, defeating the purpose. Our service provides a module specifically matched to your truck.