Are you chasing down frustrating electrical gremlins in your GM truck or SUV? One minute the power windows work, the next they don’t. Maybe your dash lights are flickering, the radio is acting possessed, or you’re getting random ‘Service’ messages. As a technician with over two decades of diagnostic experience, I’ve seen these exact issues hundreds of time, and they almost always point to a failing Body Control Module (BCM). This isn’t just an annoyance; it’s the central nervous system for your vehicle’s comfort and convenience features, and when it fails, it can make your premium vehicle feel unreliable.
Forget the expensive trip to the dealership and the days of downtime. We offer a simple, effective solution: a replacement BCM programmed with your vehicle’s exact data. Our process is designed for both professional shops and determined DIYers. You simply send us your original BCM, we transfer all the critical information (like VIN, mileage, and key data) to this replacement unit, and ship it right back to you. The result is a true plug-and-play fix that restores full functionality without requiring a high-cost factory scan tool for setup. This is the most reliable and cost-effective way to solve your BCM problems and get your vehicle back to 100%.
From the Diagnostic Bay: The Case of the Confused Silverado
A customer brought in a 2015 Silverado 1500 with a laundry list of bizarre symptoms: the horn would honk when using the turn signal, and the dome light wouldn’t turn off. They had already replaced the battery and the turn signal switch based on forum advice, with no luck. On my scan tool, I saw a slew of U-codes (communication errors) pointing to the BCM. This is a classic scenario where the BCM’s internal logic has failed, causing it to misinterpret inputs. Instead of a complex and costly wiring chase, a programmed 2015 Sierra Denali 2500 BCM (which shares the same architecture) was the direct fix. By cloning his original module, we preserved all his key fob and security settings, making the final repair a simple 20-minute swap.
Is Your Vehicle Showing These Symptoms?
A failing BCM can cause a wide range of issues that seem unrelated. If you’re experiencing any of the following, your BCM is the likely culprit:
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting (flickering, staying on, or not turning on).
- ✔ Malfunctioning security system or key fobs not being recognized.
- ✔ Incorrect gauge readings or warning lights on the instrument cluster.
- ✔ Communication DTCs such as U0140, U0155, or B1001.
- ✔ A/C and climate control functions operating incorrectly.
A Straightforward Guide to Installation
Installing your programmed BCM is a manageable job for anyone with basic tools. While the exact location varies slightly by model (see fitment list), it’s typically found under the driver’s side dash.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most Sierra/Silverado models, it’s located under the steering column, often attached to a metal bracket. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting location.
- Install the New Module: Mount your pre-programmed BCM in the same location and securely plug in all the electrical connectors.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all body functions—windows, locks, lights, radio, etc.—to confirm the repair.
Important Post-Installation Notes
Our programming service handles the heavy lifting, but some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following:
- Airbag System Sync: If your airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a security measure to sync the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure proper brake light and traction control operation. This can also be done with a capable bidirectional scan tool.
- No Core Charge: You are not required to return your old module. This service is for programming a replacement unit for you.
Verified Vehicle Compatibility
This BCM is a direct fit for a wide range of GM vehicles. Please match your part number (13592137, 13506935, 13506936, 13587704, 13594764) and verify your model in the list below.
- 2015 Cadillac ATS: (on firewall)
- 2015 Cadillac CTS: (Sdn, LH dash)
- 2015 Cadillac Escalade / ESV: (under steering column, w/opt AVF)
- 2015 Cadillac XTS: (left front hinge pillar)
- 2015-2016 Chevrolet Impala: (VIN 1, New Style, LH dash)
- 2015 Chevrolet Silverado 1500 / 2500 / 3500: (under steering column)
- 2015-2018 Chevrolet Sonic: (RH rear quarter panel)
- 2015 Chevrolet Suburban 1500: (under steering column, w/opt AVF)
- 2015 Chevrolet Tahoe: (under steering column, w/opt AVF)
- 2015 GMC Sierra 1500 / 2500 / 3500: (under steering column / LH firewall)
- 2015 GMC Sierra Denali 1500 / 2500 / 3500: (under steering column)
- 2015 GMC Yukon / Yukon XL 1500: (under steering column, w/opt AVF)
- 2015 Chevrolet Corvette: (LH dash)
Frequently Asked Questions
How does this programming service work?
After you purchase, we will contact you with instructions to ship your original BCM to us. We then extract the unique data and transfer it to the replacement module. We ship the ready-to-install module back to you, typically within 1-2 business days of receiving yours.
Do I need to take my truck to the dealer after installation?
No. Our cloning service makes this a plug-and-play part. The only exception is the potential need for an airbag sync or brake pedal relearn, which can be done by any competent independent shop with a professional scan tool.
Will this fix my specific electrical problem?
This module corrects issues directly caused by a faulty BCM, such as erratic lights, locks, windows, and security system faults. It will not fix problems related to wiring, switches, or other modules. A proper diagnosis is always recommended.
What does ‘cloning’ or ‘programming’ mean?
It means we copy the vehicle-specific software, VIN, key information, and security settings from your old BCM to the new one. This makes the vehicle accept the new module as if it were the original, avoiding the need for expensive dealership programming.
Is this the right part for my 2015 Sierra Denali 2500 BCM?
Yes, this service is fully compatible. It is designed to work with part number 13592137 and the other interchangeable numbers listed. It will restore all factory body control functions for your vehicle.