Restore Your Truck’s Electrical System with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2015 GMC Sierra—like flickering headlights, power windows with a mind of their own, or random warning lights on the dash—you’re likely facing a failing Body Control Module (BCM). As the central computer for your vehicle’s comfort and convenience features, a faulty BCM can turn your reliable truck into a source of daily frustration. Dealerships will quote you a fortune for a new module plus mandatory programming fees. We offer a smarter, more affordable solution.
This is a replacement BCM that comes fully programmed using the data from your original unit. This ‘cloning’ service makes installation a breeze. You simply send us your old BCM, we transfer all the critical vehicle-specific data (including VIN and security information) to this replacement module, and ship it back to you ready to install. No dealership visits, no expensive scan tools, no programming headaches. It’s the most direct path to getting your truck back to 100% functionality.
From the Diagnostic Bay: The Case of the Intermittent No-Start
A few months back, a 2015 Silverado was towed into my shop. The owner was at his wit’s end. The truck would randomly refuse to crank, the radio would cut out, and the interior lights would pulse faintly. He’d already replaced the battery and alternator to no avail. Instead of just throwing parts at it, I started by checking the data network. The BCM was intermittently dropping offline, causing communication codes (like U0140) across multiple systems. A quick voltage check at the BCM connector showed a stable input, confirming the module itself was failing internally—a common issue. By providing a programmed 2015 Sierra Body Control Module, we had him back on the road the next day for a fraction of what a dealership would have charged for diagnostics and programming.
Is Your Truck Showing These Symptoms?
A failing BCM doesn’t always trigger a check engine light. Instead, look for these tell-tale signs of failure:
- ✔ Power windows, door locks, or mirrors working erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system acting up, causing no-start or no-crank conditions.
- ✔ False warnings on the instrument cluster (e.g., ‘Service StabiliTrak’, door ajar).
- ✔ Communication Diagnostic Trouble Codes (DTCs) like U0140, U0155, or B1001 stored in other modules.
- ✔ A/C and climate control functions not responding correctly.
Your Straightforward BCM Installation Guide
Installing your programmed BCM is a simple swap. Here’s how you do it on a 2015 Sierra:
- Safety First: Disconnect the negative terminal from your truck’s battery and wait a few minutes for the systems to fully power down.
- Locate the BCM: On most 2015 GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the multiple 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 connectors. You’ll hear a ‘click’ when they are properly seated.
- Power Up and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions: lights, locks, windows, radio, etc. to confirm the repair was successful.
Important Post-Installation Notes
While our programming service makes this a plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following:
- Airbag System Sync: If the airbag warning 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 and is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be required to ensure proper brake light and traction control operation.
- No Core Charge: You are not required to return your old module to us. There is no core charge associated with this purchase.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Fitment for Your GM Vehicle
This module is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. It is guaranteed to fit the following vehicles:
- 2015 Chevrolet Corvette
- 2015-2016 Chevrolet Impala (New Style)
- 2015 GMC Sierra 1500 / 2500 / 3500
- 2015 GMC Sierra Denali 1500 / 2500 / 3500
- 2015 Chevrolet Silverado 1500 / 2500 / 3500
- 2015 Chevrolet Suburban 1500
- 2015 Chevrolet Tahoe
- 2015 GMC Yukon & Yukon XL 1500
- 2015 Cadillac Escalade & Escalade ESV
- 2015-2016 Cadillac ATS
- 2015-2016 Cadillac CTS
- 2015 Cadillac XTS
- 2015-2018 Chevrolet Sonic
How does the mail-in programming service work?
How does the mail-in programming service work?
After you complete your purchase, we will contact you with simple instructions and a shipping address. You mail your original BCM to us. Once we receive it, we extract the vehicle-specific data and flash it onto the replacement module. We then ship the ready-to-install BCM back to you, typically within 1-2 business days.
Do I need to do any programming myself?
No. The module you receive will be fully programmed to your vehicle’s VIN and security settings. This is a plug-and-play solution designed to eliminate the need for expensive dealer tools.
What does the Body Control Module (BCM) do?
The BCM is the main computer responsible for managing your vehicle’s non-engine-related functions. This includes power windows, door locks, interior and exterior lighting, wipers, the security system, and aspects of the climate control.
Where is the BCM located on my 2015 Sierra?
On the 2015 GMC Sierra and Chevrolet Silverado, the BCM is typically found under the driver’s side dashboard, attached to a bracket near the steering column.
Is there a core charge for my old part?
No, there is no core charge. We only need your original module to perform the data cloning service. You can keep it afterward.