Fix Baffling Electrical Issues with a Plug-and-Play BCM Solution
If you’re dealing with a cascade of strange electrical problems in your 2015 GMC Sierra or other compatible GM vehicle, you’re not alone. Flickering dash lights, windows that won’t cooperate, a security system that acts up, or a truck that refuses to start can all point to one culprit: a failing Body Control Module (BCM). The BCM is the nerve center for your vehicle’s comfort and convenience features. When it goes bad, it can make your reliable truck feel haunted. This isn’t just an annoyance; it can be a major disruption to your day. We offer a straightforward, reliable fix that bypasses the dealership’s high costs and lengthy appointment schedules.
From the Diagnostic Bay: The Case of the Erratic Escalade
I remember a 2015 Escalade that came into my shop with a laundry list of complaints from the owner. The radio would turn on and off, the power liftgate worked intermittently, and the horn would chirp randomly when locking the doors. There were no engine codes, but the vehicle just felt ‘glitchy.’ After connecting my scan tool, I saw multiple ‘U’ codes (Communication Codes), specifically a U0140 – Lost Communication With Body Control Module. This told me the BCM wasn’t talking properly to the other modules on the network. Instead of a complex wiring issue, the root cause was internal failure of the BCM itself. By providing a pre-programmed module, we had the customer back on the road the next day without a trip to the dealer, solving all the ghost-in-the-machine problems at once.
How Our Simple Mail-In Programming Service Works
Forget about towing your truck to the dealer and paying for hours of diagnostic and programming labor. Our service is designed to be simple and effective. After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, our expert technicians will extract the essential vehicle-specific data and transfer it to this replacement unit. This cloning process ensures that the replacement BCM is a perfect match for your truck’s VIN, options, and key information. We then ship the fully programmed, plug-and-play module back to you, ready for installation. It’s the most efficient way to get a reliable, correctly configured 2015 Sierra BCM.
Is Your GM Vehicle Showing These BCM Failure Signs?
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The anti-theft or security system light is on, preventing the engine from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Intermittent ‘Service’ messages appearing on the driver information center.
- ✔ Diagnostic Trouble Codes (DTCs) such as U0140, B1001, or other communication-related faults.
- ✔ Complete no-start condition where the starter doesn’t even engage.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- ✔ Locate the BCM: On most 2015 Sierra and Silverado models, the BCM is located under the driver’s side of the dashboard, near the steering column. For other models, its location may vary (e.g., firewall, hinge pillar), so confirm with a service manual if unsure.
- ✔ Disconnect and Remove: Carefully unplug all electrical connectors from the original BCM. Note their orientation. Then, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all electrical connectors into their corresponding ports. You can’t mix them up; they are uniquely keyed.
- ✔ Reconnect Power: Re-attach the negative battery terminal and tighten it securely.
- ✔ Test All Functions: Start the vehicle and test all body-related functions: lights, windows, locks, horn, radio, and wipers to ensure everything is working as expected.
Important Post-Installation Information
While our cloning service makes this a plug-and-play repair, some GM systems require a ‘handshake’ after a new module is installed. Be aware of the following potential procedures:
- Airbag System Sync: If your 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 to sync the airbag system with the new BCM and clear the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be necessary to ensure proper brake light operation and to prevent issues with the traction control system.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a qualified technician for procedures specific to your vehicle.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. It is guaranteed to fit the following makes and models:
ATS: 2015-2016 (on firewall)
CORVETTE: 2015 (LH dash)
CTS: 2015-2016 (Sdn, LH dash)
ESCALADE / ESCALADE ESV: 2015 (under steering column, w/ opt AVF)
IMPALA: 2015-2016 (VIN 1, New Style, LH dash)
SIERRA 1500 / SILVERADO 1500: 2015 (under steering column)
SIERRA 2500 / SILVERADO 2500: 2015 (under steering column or LH firewall)
SIERRA 3500 / SILVERADO 3500: 2015 (under steering column or LH firewall)
SIERRA DENALI 1500/2500/3500: 2015 (under steering column)
SONIC: 2015-2018 (RH rear quarter panel)
SUBURBAN 1500: 2015 (under steering column, w/ opt AVF)
TAHOE: 2015 (under steering column, w/ opt AVF)
XTS: 2015 (left front hinge pillar)
YUKON / YUKON XL 1500: 2015 (under steering column, w/ opt AVF)
It’s simple. After your purchase, we’ll email you a prepaid shipping label and instructions. You send us your original BCM. We then transfer its unique data to the new module and ship it back to you the same day we receive it. The replacement BCM arrives at your door ready to install.
No. All the necessary security and key information is stored within the Body Control Module itself. We only need your original BCM to perform the cloning service.
This module will fix any issue directly caused by a faulty BCM. If you’re experiencing the common symptoms listed above, especially communication codes like U0140, it is the most likely solution. However, proper vehicle diagnosis is always recommended to rule out wiring or other component failures.
This is a normal possibility. It simply means the new BCM needs to be electronically introduced to the airbag system (SDM). A technician with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
There is absolutely no core charge. After we clone the data from your original module, you are free to keep it.