Is Your Sierra Denali Experiencing Bizarre Electrical Issues?
The Body Control Module (BCM) is the central command center for your truck’s body electronics. It manages everything from your power windows, door locks, and interior lights to the security system and key fob recognition. When the BCM begins to fail, it can create a cascade of confusing and frustrating symptoms that seem unrelated, making diagnosis a nightmare for the average owner. If your truck is acting possessed, a faulty BCM is the likely culprit.
From the Diagnostic Bay
We had a 2015 Sierra Denali roll into the shop with a list of complaints that sounded like a poltergeist had taken up residence. The dome light would flicker randomly, the radio would cut out intermittently, and the driver’s side window would sometimes refuse to go up. The owner had already replaced the battery and checked every fuse he could find. A full diagnostic scan revealed a flood of communication errors between various modules. The root cause wasn’t a dozen different problems; it was one: the 2015 Sierra Denali BCM was failing and corrupting the vehicle’s data network. By providing a replacement module cloned from the original, we were able to resolve every single issue in one go, restoring the truck to perfect health without a costly trip to the dealer.
Common Symptoms of a Failing BCM
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ The vehicle’s security system randomly activating or not engaging.
- ✔ Key fobs not being recognized, or intermittent remote start issues.
- ✔ Dashboard warning lights for unrelated systems (e.g., StabiliTrak, ABS) illuminating.
- ✔ Wipers or turn signals activating on their own.
- ✔ Radio or infotainment system malfunctions and resets.
The Simple, Plug-and-Play Solution
Don’t let a faulty BCM keep your truck off the road or force you into an expensive dealership visit for programming. Our professional cloning service makes this repair straightforward and cost-effective. Here’s how it works:
- Place Your Order: Complete your purchase, ensuring your contact information is accurate.
- Ship Us Your Original BCM: We will contact you with simple instructions for shipping your original module to our facility.
- We Handle the Programming: Our technicians will transfer all critical data—including your vehicle’s VIN, mileage, key information, and specific options—from your original BCM to the replacement unit.
- Receive Your Ready-to-Install Module: We ship the fully programmed replacement BCM back to you. Installation is as simple as plugging it in. No dealer intervention required!
Post-Installation Procedures
While our goal is a 100% plug-and-play experience, some vehicle systems may require a simple sync 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, a “Setup SDM Primary Key in BCM” procedure is needed. This requires a professional-grade scan tool to sync the modules and clear the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure correct brake light operation and stability control function.
Always consult a factory service manual or a qualified technician for vehicle-specific guidance.
Guaranteed Compatibility
This 2015 Sierra Denali BCM is a direct replacement for several part numbers, ensuring a perfect fit and function for a wide range of GM vehicles. Please verify that your original module’s part number is on this list:
Compatible Part Numbers: 13592137, 13506935, 13506936, 13587704, 13594764
This module fits numerous 2015-2018 GM models including the Sierra, Silverado, Tahoe, Suburban, Escalade, Corvette, CTS, ATS, and more. Restore your vehicle’s functionality and peace of mind with this reliable, pre-programmed solution.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, security systems, and more.
Why do I need to send my original BCM to you?
Your original BCM contains unique data specific to your truck, including the VIN, security information for your keys, and settings for its options. By cloning this data to the replacement module, we ensure the new part is a 100% plug-and-play match, eliminating the need for expensive dealership programming.
Will my existing keys and key fobs work?
Yes. Because we transfer all the security information from your original module, your existing keys and remotes will work immediately upon installation with no additional programming required.
How long does the cloning service take?
Once we receive your original module, the programming process is typically completed and shipped back out within 1-2 business days. We will provide you with a return tracking number as soon as it ships.
What happens if I have an airbag light after installation?
In some cases, the airbag system (SDM) needs to be re-synced with the new BCM. This is a standard procedure called “Setup SDM Primary Key in BCM” that can be performed by any competent repair shop with a professional-grade diagnostic tool.