Restore Your Truck’s Electrical System with a Hassle-Free Solution
Are you battling a storm of bizarre electrical problems in your GM truck or car? Flickering lights, malfunctioning power windows, a dashboard that’s lit up like a Christmas tree, or even a vehicle that refuses to start can all point to one culprit: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause widespread and frustrating issues. This is a direct-replacement 2015 Sierra 3500 Body Control Module, offered with our expert cloning service to get you back on the road without the exorbitant costs and scheduling headaches of a dealership visit.
Over my 20+ years in automotive diagnostics, I’ve seen how a bad BCM can mimic a dozen other problems, leading owners down a costly path of replacing parts that aren’t broken. The solution isn’t just a new part; it’s a part that’s correctly configured for your specific vehicle. Our professional cloning service transfers all the critical data—including your vehicle’s VIN, mileage, and specific options—from your original BCM to this replacement unit. This means when you receive it back, it’s a true plug-and-play fix, pre-programmed and ready for installation.
A Technician’s Notebook: The Ghost in the Sierra
A customer brought in a 2015 Sierra 2500 with a list of complaints that sounded like a poltergeist had taken up residence in his truck. The radio would turn on and off, the dome light would flicker while driving, and occasionally the horn would honk when he used the turn signal. He’d already replaced the battery and alternator to no avail. After connecting my scan tool, I found a slew of communication error codes (U-codes) pointing to a network failure. The common link? The BCM. By swapping in a pre-programmed module like this one, we resolved every single issue in under an hour. It’s a classic case where the central ‘brain’ for body functions goes haywire, and a simple, correctly programmed replacement is the only true fix.
Is Your Vehicle Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not working.
- ✔ The security system acting erratically or preventing the engine from starting.
- ✔ Inaccurate gauge readings on the instrument cluster.
- ✔ Diagnostic Trouble Codes (DTCs) related to lost communication with the BCM, such as U0140, U0155, or B1001.
- ✔ Horn, wipers, or other accessories activating on their own.
A Straightforward Guide to Our Cloning Service & Installation
Our process is designed to be simple and efficient. Once you complete your purchase, we will contact you with instructions for shipping your original BCM to our facility. Please ensure your contact information is accurate at checkout.
- Purchase & Ship: After you place your order, you’ll ship your original BCM to us. We’ll provide the shipping address and instructions.
- Expert Data Transfer: Upon arrival, our technicians will perform a full data clone, transferring all vehicle-specific information from your old module to the new one.
- Return & Install: We ship the programmed module back to you, typically within 24-48 hours. Once you receive it, installation is straightforward.
- Safety First: Before starting, disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate and Remove: The BCM is typically located under the steering column or behind the driver’s side dash. Disconnect the wiring harnesses and unbolt the module.
- Install New Module: Mount the programmed BCM in place and securely reconnect all wiring harnesses.
- Reconnect Battery: Reattach the negative battery terminal. Your vehicle’s core functions should now be restored.
Important Post-Installation Notes
While our cloning service makes this a plug-and-play repair, some GM vehicles require a final handshake between modules after installation. Be aware of the following potential procedures:
- Airbag System Sync: If your 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 airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light operation and to satisfy the traction control system.
- No Core Charge: You are not required to return your original module after the service is complete. There is no core charge or fee.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult with a qualified automotive technician if you are unsure about any step.
Verified Vehicle Compatibility
This module is a guaranteed fit for a wide range of GM vehicles. It directly replaces part numbers 13594692, 13594768, 13593214, 13580690, 13591519, and 13594769. Please verify your part number or match your vehicle from the list below.
Fits: ATS (14), Caprice (14-17), Corvette (14), CTS (14), Escalade/ESV (15), Impala (15-19), SS Caprice (14-17), Suburban 1500 (15), Tahoe (15), XTS (14), Yukon/XL 1500 (15), Sierra/Silverado 1500 (14), Sierra/Silverado 2500/3500 (15) and more. Please check the detailed list for specific options and conditions.
Frequently Asked Questions
How does the cloning service work?
After you purchase, you will ship your original BCM to us. We extract the unique data (VIN, mileage, options) and flash it onto the replacement module. We then ship the programmed, ready-to-install module back to you.
Why is this better than buying a used BCM from a junkyard?
A junkyard BCM will have the incorrect VIN and equipment configuration for your vehicle, causing many features not to work and requiring expensive dealer programming. Our service ensures the module is a perfect match for your truck’s specific build.
Is this a difficult part to install for a DIYer?
The physical replacement is generally straightforward for someone with basic mechanical skills. It’s typically located under the dash and held in by a few bolts and electrical connectors. The key benefit is that no programming is needed on your end.
What happens if my airbag light comes on after installation?
This is a known possibility on some GM models. The security data for the airbag system (SDM) needs to be re-synced with the BCM. This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be performed by any professional shop with a compatible scan tool.
Do I need to return my old BCM?
No. We only need your original BCM for the data cloning process. Once the service is complete, you can keep your old module as there is no core charge.