Is Your Truck’s Electrical System Acting Possessed?
If you’re dealing with flickering lights, power windows with a mind of their own, or a dashboard that lights up like a Christmas tree for no reason, you’re likely facing a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can cause a cascade of frustrating and unpredictable problems. In my 20+ years in the shop, I’ve seen these modules cause everything from simple annoyances to complete no-start conditions, leaving owners stranded and confused.
Forget expensive dealership visits and the headache of programming a new module from scratch. We offer a simple, reliable solution: a replacement BCM programmed with your vehicle’s exact data. This isn’t just a part; it’s a complete fix. By cloning the information from your original BCM directly onto this replacement unit, we create a true plug-and-play component. Once you receive it back, you simply install it, and your vehicle is back to normal, retaining all its original settings and key information. This service is the most efficient way to resolve issues related to a faulty 2015 Sierra 3500 BCM.
Case Study: The Ghost in the Sierra
A customer brought in his 2015 Sierra 3500 with a list of bizarre symptoms: the radio would randomly shut off, the dome light would stay on, and occasionally, the truck wouldn’t recognize the key fob. He’d already replaced the battery and checked all the fuses. After connecting my scan tool, I found several ‘Lost Communication’ codes (U-codes) pointing to the BCM. Instead of a new, un-programmed module that would require hours of setup at the dealer, we used a cloned unit. The entire data transfer took about an hour in our facility, and the customer was able to install the replacement BCM himself in his driveway. The ‘ghosts’ were gone for good—a perfect example of how this service saves time, money, and immense frustration.
Common Signs of a Failing BCM
A bad Body Control Module can manifest in numerous ways. If your vehicle is showing any of these signs, your BCM is the likely culprit. Look out for Diagnostic Trouble Codes (DTCs) like U0140, U0155, or B1325.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system preventing the vehicle from starting.
- ✔ Key fobs not being recognized or functioning intermittently.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Warning lights for ABS, Airbag, or Traction Control appearing on the dash.
- ✔ Inaccurate gauge readings or a dead instrument cluster.
A Straightforward Guide to Installation
Our cloning service makes the physical replacement simple. After you receive the programmed module from us, follow these general steps. The BCM is typically located under the steering column on the driver’s side.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system to fully discharge.
- Locate the BCM: On most GM trucks and SUVs, it’s mounted to the firewall or under the dash, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect Connectors: Carefully unclip the multiple wiring harnesses attached to the module. Each connector has a locking tab that needs to be depressed or pulled. Do not force them.
- Remove the Old Module: Unbolt or unclip the original BCM from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Test Functionality: Start the vehicle and test all the functions that were previously malfunctioning—windows, locks, lights, etc.
Important Post-Installation Notes
While our cloning process makes this a near plug-and-play repair for your 2015 Sierra 3500 BCM, some vehicle systems may require a quick sync-up. Please be aware of the following:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool and syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure your brake lights and traction control system function correctly. This is also performed with a scan tool.
- No Core Charge: You are not required to send your original BCM back to us after the service. There is no core charge.
Will This Fit My Vehicle?
This BCM is a direct replacement for a wide range of General Motors vehicles. Please verify your part number and model from the list below. This module is compatible with part numbers 13594692, 13594768, 13593214, 13580690, 13591519, and 13594769.
- Cadillac ATS (2014)
- Cadillac CTS (2014)
- Cadillac Escalade / ESV (2015)
- Cadillac XTS (2014)
- Chevrolet Caprice / SS Caprice (2014-2017)
- Chevrolet Corvette (2014)
- Chevrolet Impala (2015-2019)
- Chevrolet Silverado 1500 (2014)
- Chevrolet Silverado 2500 / 3500 (2015) – ID 13594692
- Chevrolet Suburban 1500 (2015)
- Chevrolet Tahoe (2015)
- GMC Sierra 1500 / Denali 1500 (2014)
- GMC Sierra 2500 / 3500 & Denali 2500 / 3500 (2015) – ID 13594692
- GMC Yukon / Yukon XL 1500 (2015)
Frequently Asked Questions About Our BCM Service
Frequently Asked Questions
How does the programming service work?
After you place your order, we will provide you with instructions and a shipping address. You send us your original BCM. We then extract the vehicle-specific data and transfer it to the replacement module. This ensures all your keys, mileage, and vehicle options work perfectly upon reinstallation. We then ship the programmed module back to you, ready to install.
Will I need to have a dealer program this part?
No. The entire point of our service is to eliminate the need for dealer programming. Because we clone your original data, the vehicle will recognize the replacement BCM as its own, making it a true plug-and-play solution.
Is this a reliable fix for my 2015 Sierra 3500 BCM?
Absolutely. This is the most reliable method for replacing a BCM. It restores original functionality without the risk of software incompatibility or the high cost associated with programming a new module from scratch at a dealership.
What if my original BCM is completely dead or missing?
In cases where the original module is non-communicative (e.g., due to water or fire damage), data cloning may not be possible. Please contact us before purchasing if your module cannot be read, as we may have alternative solutions.
How long does the service take?
Once we receive your original module, the cloning and programming process typically takes 1-2 business days. We will then ship the replacement module back to you, and tracking information will be provided at that time.