Restore Your Truck’s Functionality and End Electrical Frustration
Is your 2015 Sierra or other GM vehicle acting possessed? Flickering lights, a dead instrument cluster, power windows with a mind of their own, or a key fob that works one minute and not the next? These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central hub for your vehicle’s body electronics, and when it starts to fail, it can create a cascade of baffling and unpredictable problems. Instead of facing a costly trip to the dealership for diagnostics and programming, our service provides a straightforward, reliable solution. We supply a fully functional replacement BCM, professionally programmed with your vehicle’s original data, making the repair process as simple as possible.
From the Diagnostic Bay: The Case of the Ghostly Sierra
I remember a 2015 Sierra 1500 that came into my shop with a list of complaints that seemed completely unrelated. The owner said his radio would shut off randomly, the dome light would flicker while driving, and sometimes the truck wouldn’t recognize his key. He’d already replaced the battery and checked the main grounds. The scan tool showed a dozen intermittent communication codes (U-codes) with various modules. This is a tell-tale sign. The issue wasn’t with the individual components; it was the central computer coordinating them. A failing BCM was causing a data storm on the CAN bus network. By providing a cloned 2015 Sierra BCM, we had him back on the road the same day—no expensive dealership programming, no more electrical ghosts.
Is Your Vehicle Showing These Symptoms?
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior (flickering, staying on, or not working at all).
- ✔ Key fob recognition issues or problems with the push-to-start system.
- ✔ A security or anti-theft light that stays illuminated, preventing the engine from starting.
- ✔ Instrument cluster gauges behaving erratically or going completely dark.
- ✔ Diagnostic Trouble Codes (DTCs) related to communication loss, such as U0140, U0155, or other U-codes.
- ✔ Wipers or climate control functions that operate incorrectly.
How Our Simple Programming Service Works
Our goal is to make this repair seamless. After you purchase, we will contact you with clear instructions for shipping your original BCM to our facility. Once we receive it, our expert technicians will extract the essential vehicle-specific data and transfer it directly to your replacement module. This cloning process ensures that the new BCM is a perfect match for your truck’s VIN, options, and security keys. We then ship the ready-to-install module back to you, typically within one business day. This service completely bypasses the need for expensive factory scan tools and programming subscriptions.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any work on the electrical system.
- ✔ Locate the BCM: On most 2015 Sierra and Silverado models, the BCM is located under the steering column, on the driver’s side of the dashboard. For other models, its location may vary (e.g., firewall, LH dash). A quick search for your specific model will confirm its position.
- ✔ Remove Connectors: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Do not force them.
- ✔ Swap the Module: Unbolt or unclip the original BCM from its mounting bracket and set it aside. Mount your new, pre-programmed BCM in its place.
- ✔ Reconnect Everything: Plug all the electrical connectors firmly into the new BCM. You should hear a ‘click’ as they lock into place. Reconnect the negative battery terminal.
- ✔ Perform Final Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, and radio—to ensure everything is working correctly. Note the post-installation procedures below.
Important Post-Installation Information
While our programming handles the critical vehicle data, some onboard safety systems may require a final handshake after installation. These procedures typically require a bi-directional scan tool.
- Airbag System Sync: If the airbag warning light is on after installation, a technician will need to perform the “Setup SDM Primary Key in BCM” procedure to sync the modules.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct operation of the brake lights and stability control systems.
- No Core Charge: You are not required to return your old module, so there is no core charge or deposit to worry about.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 13587704 and is also compatible with part numbers 13592137, 13506935, 13506936, and 13594764. It fits a wide range of 2015-2018 GM vehicles, including:
- Cadillac: ATS, CTS, Escalade, Escalade ESV, XTS
- Chevrolet: Corvette, Impala, Silverado 1500/2500/3500, Sonic, Suburban 1500, Tahoe
- GMC: Sierra 1500/2500/3500, Sierra Denali 1500/2500/3500, Yukon, Yukon XL 1500
Please verify the part number on your original module or consult the detailed fitment list to confirm compatibility with your specific vehicle and options.
Frequently Asked Questions
Why do I need to send you my original BCM?
Your original BCM contains unique data specific to your vehicle’s VIN, security system (immobilizer), and factory-installed options. By cloning this data to the replacement unit, we ensure it’s truly plug-and-play, saving you from a mandatory and expensive programming session at a dealership.
Is this a difficult part for a DIYer to replace?
For most of the trucks listed, like the 2015 Sierra, the physical replacement is straightforward. The BCM is typically accessible under the driver’s side dashboard. The most important part is carefully disconnecting and reconnecting the wiring harnesses. Our pre-programming service handles the difficult software side of the job.
What is the turnaround time for the programming service?
We pride ourselves on a fast turnaround. Once we receive your original module, we typically program the replacement and have it shipped back out to you within one business day. We will provide you with a return tracking number as soon as it ships.
Will I need any special tools for the installation?
The physical installation usually only requires basic hand tools like a socket set or screwdriver to access and remove the module. However, as noted, some vehicles may require a professional-grade scan tool for post-install procedures like an airbag system sync or brake pedal position relearn.
Do I have to return my old BCM? Is there a core charge?
No. There is absolutely no core charge for this item. You can keep your original module.