Is Your 2015 Sierra Denali Experiencing Strange Electrical Issues?
If your truck’s lights are flickering, power windows are acting up, or you’re seeing random warning messages on your dash, you’re likely dealing with a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s electronic accessories, managing everything from the interior lights and power locks to the security system and climate control. When it starts to fail, it can cause a cascade of frustrating and seemingly unrelated problems that can be difficult to diagnose.
From the Diagnostic Bay
We had a 2015 Silverado 1500 (which uses this same BCM) come into the shop with the most bizarre symptoms. The customer complained that his radio would randomly turn off, the dome light would stay on for minutes after closing the door, and occasionally, the truck wouldn’t recognize his key fob. He’d already replaced the battery and checked all the fuses. After hooking up our diagnostic scanner, we saw multiple communication error codes pointing to the BCM. Instead of a complex wiring issue, it was a classic case of internal BCM failure. A programmed replacement module like this one had him back on the road with all systems nominal in under an hour.
Symptoms of a Failing Body Control Module
- ✔ Intermittent or non-functional power windows, locks, or mirrors.
- ✔ Erratic behavior from interior or exterior lights (flickering, staying on, or not turning on).
- ✔ Malfunctioning windshield wipers or horn.
- ✔ Key fob not being recognized or intermittent remote start issues.
- ✔ False alarms from the security system or a “Service Theft Deterrent System” message.
- ✔ Inaccurate readings on the instrument cluster gauges.
- ✔ Communication errors with other vehicle modules, leading to various warning lights.
The Simple, Plug-and-Play Solution for Your 2015 Sierra Denali BCM
Don’t waste time and money at the dealership with a brand new, unprogrammed module that requires expensive, specialized tools for installation. Our professional cloning service makes this repair straightforward and cost-effective. We transfer all the critical data from your original BCM—including the VIN, mileage, key fob programming, and specific vehicle options—directly onto this replacement unit. The result is a true plug-and-play module that is ready for installation right out of the box. No additional programming or dealer visits are required.
How Our Programming Service Works:
- ✔ Place Your Order: Complete your purchase through our secure checkout.
- ✔ We’ll Contact You: We will reach out to you with clear, simple instructions and a shipping address for sending us your original BCM.
- ✔ Ship Your Original Module: Pack your original BCM securely and ship it to us.
- ✔ Cloning and Return: Once we receive your module, we will perform the data transfer to the replacement unit within 1-2 business days and ship both modules back to you with tracking information.
Post-Installation Information
While our goal is a seamless installation, some GM vehicles may require a simple relearn procedure after the new BCM is installed. Please be aware of the following potential requirements:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a “Setup SDM Primary Key in BCM” procedure must be performed with a professional scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be needed to ensure correct brake light operation and traction control function.
Note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Guaranteed Fitment for Multiple Part Numbers
This BCM is a direct replacement for the following part numbers: 13592137, 13506935, 13506936, 13587704, 13594764. It is compatible with a wide range of 2015-2018 GM vehicles, including the Sierra, Silverado, Tahoe, Suburban, Escalade, Corvette, and more. Please verify your part number and check the fitment list to ensure compatibility.
Frequently Asked Questions
What data is transferred from my old BCM?
We perform a complete data clone. This includes your vehicle’s VIN, security information (key fobs), mileage, and all factory-installed options. This ensures all features work exactly as they did before.
Is this a difficult part to install?
Physically, the BCM is typically located under the driver’s side dashboard and is held in by a few bolts or clips and electrical connectors. For most DIYers with basic tools, it’s a manageable job. The key benefit of our service is that it eliminates the need for any computer programming after installation.
How long does the cloning process take?
Once we receive your original module, our technicians typically complete the cloning and testing process within 24-48 hours. We then ship your replacement module back to you promptly.
Do I need to send my keys or key fobs?
No. Since we are cloning the data that recognizes your existing keys and fobs, you do not need to send them to us. Your current keys will work immediately upon installation of the new module.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM is not functioning in the vehicle, we can still extract the necessary data. Please contact us before ordering if your module is severely damaged (e.g., water or fire damage) to discuss options.