Is Your 2015 Sierra 1500 Plagued by Electrical Gremlins?
If you’re dealing with bizarre and frustrating electrical issues in your 2015 GMC Sierra or a related GM vehicle, a failing Body Control Module (BCM) is the most likely culprit. The BCM acts as the central command center for your truck’s body electronics, managing everything from your power windows and locks to the interior lights and theft deterrent system. When it starts to fail, it can create a cascade of problems that are often difficult to diagnose, leading to costly and unnecessary repairs.
From the Diagnostic Bay
We recently had a customer with a 2015 Sierra 1500 who was on his third new battery in a year. He’d also replaced the alternator, but the truck would still be dead after sitting for a day or two. He was convinced it was a parasitic drain he couldn’t find. After a quick diagnostic scan, we found the BCM was failing to go into ‘sleep’ mode, keeping the instrument cluster and other modules powered on long after the key was out. This faulty 2015 Sierra 1500 BCM was the hidden source of his battery drain. A replacement module programmed with his original data solved the problem permanently.
Common Symptoms of a Failing BCM
A faulty BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s time to consider a replacement:
- âś” Power windows, door locks, or mirrors operating intermittently or not at all.
- âś” Interior dome lights, headlights, or taillights staying on or not turning on.
- âś” The security light is flashing and the vehicle won’t start (“Service Theft Deterrent System” message).
- âś” Horn honking randomly or not working when pressed.
- âś” Instrument cluster gauges behaving erratically or going dark.
- âś” Unexplained and persistent battery drain, even with a new battery.
- âś” Wipers activating on their own or not responding to the switch.
The Plug-and-Play Solution: A Pre-Programmed BCM
Forget the hassle and expense of a dealership visit. A new BCM from the dealer requires towing your vehicle in, paying for the expensive new part, and then paying several hundred more dollars for them to program it to your truck’s specific VIN and security information. Our service eliminates all of that. We provide a straightforward, cost-effective solution by cloning the data from your original BCM directly onto a replacement unit. This means the replacement module is a true plug-and-play part, arriving at your door ready for immediate installation.
How Our Simple Cloning Service Works:
- âś” Place Your Order: Purchase this BCM service.
- âś” Receive Instructions: We will contact you via email or phone with clear instructions on how to remove and where to ship your original BCM.
- âś” Ship Your Module: Send us your original BCM. We recommend using a tracked shipping service.
- âś” We Program Your Replacement: Our expert technicians will perform a full data transfer from your original module to the replacement unit. This includes your VIN, mileage, key fob data, and all vehicle-specific options.
- âś” Receive Your Ready-to-Install BCM: We ship the fully programmed BCM back to you, usually within one business day of receiving your original. You’ll receive tracking information so you know exactly when it will arrive.
Important Post-Installation Information
While our goal is a 100% plug-and-play experience, some modern GM vehicles have interconnected security and safety systems that may require a simple relearn procedure after the new BCM is installed. Please be aware of the following possibilities:
- Airbag System Sync: If the airbag warning light is illuminated after installation, it means the new BCM needs to be synced with the SDM (airbag module). A professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. This is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light and traction control functionality. This is a simple procedure that can be done with a capable diagnostic tool.
Always consult a factory service manual or a qualified technician if you are unsure about any post-installation steps.
Guaranteed Compatibility
This Body Control Module is a direct replacement for part number 13506935 and is also compatible with the following part numbers: 13592137, 13506936, 13587704, and 13594764. It fits a wide range of 2015 and newer GM vehicles, including the GMC Sierra, Chevrolet Silverado, Tahoe, Suburban, Cadillac Escalade, and more. Please verify your part number and check the fitment list to ensure compatibility.
Frequently Asked Questions
What data is transferred from my original BCM?
We perform a complete data clone, which includes your vehicle’s VIN, mileage, immobilizer and key fob information, and all factory-installed options. This ensures a seamless integration with your vehicle.
How long does the programming service take?
The cloning process is typically completed within 24-48 hours of us receiving your original module. We then ship the replacement unit back to you promptly.
Do I need to send my keys or key fobs with the module?
No. All the necessary key and security data is stored within the BCM itself. We do not need your keys to perform the data transfer.
Is this BCM truly plug-and-play?
Yes, for over 95% of installations. Because we clone your original data, no additional programming is needed. In rare cases, as mentioned above, a minor relearn procedure for the airbag or brake pedal sensor may be required.
What if my original BCM is completely dead or water damaged?
Please contact us before ordering if your module is non-communicative, has severe water damage, or has been damaged by fire. In some cases, we can still recover the data, but we need to assess the situation first.
Where is the BCM located on my 2015 Sierra 1500?
On the 2015 GMC Sierra 1500 and Chevrolet Silverado 1500, the BCM is typically located under the driver’s side of the dashboard, near the steering column.