Is Your GM Truck or SUV Experiencing Bizarre Electrical Issues?
If your 2015 GMC Sierra, Chevy Silverado, or other compatible GM vehicle is acting possessed, you’re not alone. Seemingly unrelated electrical gremlins—like power windows that won’t roll down, interior lights that stay on, a security system that acts up, or even a no-start condition—are often symptoms of a single point of failure: the Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, coordinating everything from your key fob and power locks to your headlights and instrument cluster. When it fails, chaos ensues.
From the Diagnostic Bay
We had a 2015 Sierra 1500 come into the shop that was driving the owner crazy. The radio would randomly shut off, the dome light would flicker, and sometimes the truck just wouldn’t start, with no crank and only a ‘Service Theft Deterrent System’ message. The owner had already replaced the battery and checked all the fuses. After hours of tracing wiring diagrams, we isolated the issue to an internal fault in the BCM. A standard replacement wouldn’t work without a trip to the dealer for expensive programming. Instead, we performed a data transfer to a replacement module. Once installed, every single electrical issue was gone. It was like getting a new truck.
Common Symptoms of a Failing BCM
- ✔ Intermittent or non-functional power windows, locks, and mirrors.
- ✔ Erratic instrument cluster behavior, with gauges dropping out or warning lights appearing randomly.
- ✔ Headlights, taillights, or interior lights not working correctly or staying on.
- ✔ Key fob not being recognized, or the push-to-start system failing.
- ✔ ‘Service Theft Deterrent System’ or other security-related messages on the dash.
- ✔ Unexplained battery drain that leaves you with a dead battery overnight.
- ✔ Communication issues with other modules, leading to a variety of diagnostic trouble codes (DTCs).
The Plug-and-Play Solution: Our 2015 Sierra BCM Programming Service
Replacing a BCM isn’t as simple as swapping the part. Each module is programmed with your vehicle’s specific Vehicle Identification Number (VIN), security information, and optional features. A new or used BCM from another vehicle will not work correctly without being programmed by a dealer, which can be costly and time-consuming. Our professional programming service eliminates that hassle. We take the critical data from your original, failing BCM and transfer it directly to this fully functional replacement module. The result is a true plug-and-play solution. No dealer visit, no additional programming—just install the module and get your truck back to normal.
How It Works: A Simple 4-Step Process
- ✔ Place Your Order: Complete your purchase through our secure checkout.
- ✔ We Contact You: We will reach out with clear, simple instructions for shipping your original BCM to our facility. Please ensure your contact information is accurate.
- ✔ We Program Your Module: Once we receive your original BCM, our technicians will professionally transfer all necessary data to the replacement module. This process typically takes 1-2 business days.
- ✔ Receive Your Ready-to-Install BCM: We ship the programmed module back to you. Once it arrives, simply install it in your vehicle. We will provide you with tracking information as soon as it ships.
Post-Installation Information
In most cases, the installation is 100% plug-and-play. However, due to the complexity of modern vehicle systems, a couple of minor relearn procedures may be necessary after installation:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a technician will need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool. This syncs the BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be required to ensure proper brake light and traction control operation.
Note: These procedures are straightforward for any qualified automotive shop. Always consult a factory service manual for vehicle-specific instructions.
Guaranteed Fitment for Part Number 13592137
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 GMC Sierra, Chevy Silverado, Tahoe, Suburban, Cadillac Escalade, ATS, CTS, and more. Please verify your part number and check the detailed fitment list to ensure compatibility.
Frequently Asked Questions
Why do I need to send you my original BCM?
Your original BCM contains the unique VIN, security codes, and software configuration for your specific vehicle’s options. By transferring this data to the replacement module, we create a plug-and-play part that works perfectly without requiring a trip to the dealership for expensive programming.
Is this a difficult part to install?
On most compatible trucks and SUVs like the Sierra and Silverado, the BCM is located under the steering column and is accessible by removing a few trim panels. It is held in place by a few bolts and has several electrical connectors. While it is a straightforward replacement, we always recommend installation by a qualified technician.
What if my original BCM is completely dead or water damaged?
In many cases, even if the BCM is non-functional, we can still extract the necessary data from the memory chip. Please contact us before ordering if your module has significant physical or water damage so we can assess the likelihood of a successful data recovery.
How long does the entire process take?
Once we receive your original module, the programming and testing process typically takes 1-2 business days. The total turnaround time will depend on shipping times to and from our facility. We ship the completed module back to you promptly and provide tracking information.
Do I need any special tools for installation?
Basic hand tools are all that’s needed to physically replace the module. However, as mentioned, a professional-grade diagnostic scan tool may be required for post-installation procedures like the airbag system sync or brake pedal position relearn if those warning lights appear.