End the Electrical Gremlins in Your GM Truck or Car
Are you chasing bizarre electrical issues in your 2015 Sierra Denali 3500? Flickering dashboard lights, power windows with a mind of their own, or a security system that randomly acts up? As a technician with over 20 years of experience, I’ve seen these exact frustrations hundreds of times. More often than not, the culprit is a failing Body Control Module (BCM)—the central nervous system for your vehicle’s electronics. A faulty BCM can turn a reliable vehicle into a source of constant annoyance and can even prevent it from starting.
Forget the expensive dealership visit, the cost of towing, and the days of downtime. We offer a straightforward, reliable solution. This listing is for a replacement BCM, part number 13594768 (and other interchangeable numbers listed below), that comes ready for installation thanks to our professional programming service. You simply send us your original BCM, and we transfer all its vital data—including VIN, mileage, and key programming—to this replacement unit. The result is a true plug-and-play fix that restores full functionality without needing a dealer’s proprietary scan tool for programming.
From the Diagnostic Bay: The Case of the Haunted Silverado
A customer brought in a 2015 Silverado 2500 with a list of symptoms that sounded like something out of a horror movie. The radio would switch stations on its own, the interior lights would pulse dimly at night, and occasionally, the horn would honk when he used the turn signal. He’d already replaced the battery and checked all the grounds. After connecting my diagnostic tool, I saw a flood of U-codes (communication errors), specifically U0140 – Lost Communication with Body Control Module. This pointed directly to a BCM that was failing internally, corrupting the data network. By providing a data-cloned 2015 Sierra Denali 3500 BCM, we had his truck’s electronics behaving perfectly in a day, saving him from a massive dealership bill.
Is Your GM Vehicle Showing These BCM Failure Signs?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Dashboard warning lights (ABS, Airbag, Security) illuminating without cause.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The horn sounding unexpectedly or not working when pressed.
- ✔ Key fob not being recognized, leading to starting issues or security system faults.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or B1001.
- ✔ A complete no-start condition where the vehicle’s security system immobilizes the engine.
Your Straightforward BCM Installation Guide
Installing your programmed BCM is a manageable task for a confident DIYer. The module is typically located under the driver’s side dashboard.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- Locate the BCM: On most GM trucks and SUVs, the BCM is mounted under the steering column or to the left of it, near the firewall. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that must be depressed to release. Once all connectors are free, unbolt the module from its mounting bracket.
- Install the New Module: Mount the replacement BCM in the same location and securely fasten it. Reconnect all electrical connectors, ensuring they click firmly into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Post-Install Checks: Start the vehicle and test all body functions: lights, windows, locks, wipers, and radio. Review the post-installation procedures below for any necessary recalibrations.
Important Post-Installation Steps
While our programming service handles the critical data, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is only required if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be necessary to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Verified Compatibility for Your Vehicle
This BCM programming service is guaranteed to work with modules matching part numbers 13594692, 13594768, 13593214, 13580690, 13591519, or 13594769. It is a direct fit for the following models and options:
- ATS 2014 (on firewall)
- CAPRICE 2014-2017
- CORVETTE 2014 (LH dash)
- CTS 2014 (Sdn, VIN A, LH dash)
- ESCALADE & ESCALADE ESV 2015 (under steering column, w/o model year break point)
- IMPALA 2015-2016 (VIN 1, LH dash, ID 13594692)
- IMPALA 2017-2019 (LH Dash)
- SIERRA 1500 PICKUP 2014 (under steering column)
- SIERRA DENALI 1500 2014 (under steering column)
- SIERRA 2500 & 3500 PICKUP 2015 (LH firewall, ID 13594692)
- SIERRA DENALI 2500 & 3500 2015 (under steering column, ID 13594692)
- SILVERADO 1500 PICKUP 2014 (under steering column)
- SILVERADO 2500 & 3500 PICKUP 2015 (under steering column, ID 13594692)
- SS CAPRICE 2014-2017
- SUBURBAN 1500 2015 (under steering column, w/o model year break point)
- TAHOE 2015 (under steering column, w/o model year break point)
- XTS 2014 (left front hinge pillar)
- YUKON & YUKON XL 1500 2015 (under steering column, w/o model year break point)
Frequently Asked Questions
How does the programming service work?
After you place your order, we will provide you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the unique data and transfer it to the replacement module. We then ship the ready-to-install BCM back to you, typically within one business day.
Do I need to send my keys?
No, you do not need to send us your keys. Because we clone all the data from your original module, the replacement BCM will recognize your existing keys automatically upon installation.
Is this a simple plug-and-play installation?
Yes, for over 95% of installations. Our programming service handles all the complex software work, so you won’t need to visit a dealer. In rare cases, a simple relearn procedure like the brake pedal position relearn might be needed, which can often be done without special tools.
What if my original BCM is completely dead or missing?
If your BCM is not communicating, we can often still recover the data. If the module is physically destroyed or lost, please contact us before ordering. We have other solutions available but they may require additional steps.
Is there a core charge?
No, there is no core charge or need to return your old part after you receive the programmed replacement. You can keep your original module.
Will this fix my specific problem?
This BCM will resolve issues directly caused by a faulty module. It’s crucial to have your vehicle properly diagnosed to ensure the BCM is the root cause and not a wiring or sensor issue. The symptoms listed above are strong indicators of BCM failure.