Restore Your Truck’s Electrical System with a Perfectly Matched BCM
Are you dealing with baffling electrical issues in your GM truck or SUV? Flickering lights, malfunctioning power windows, or a security system that has a mind of its own are classic signs of a failing Body Control Module (BCM). It’s the central hub for your vehicle’s body electronics, and when it goes bad, it can make your reliable truck feel unpredictable. This isn’t just an inconvenience; it can be a safety concern. We offer a dependable, straightforward solution with our pre-programmed BCM replacement service, specifically for part number 13587704 and its equivalents.
How Our Plug-and-Play Programming Service Works
Forget the hassle and expense of a dealership visit. A new BCM from the dealer comes blank and requires costly programming with specialized tools. Our service bypasses that entire process. Here’s how simple it is:
- You purchase this BCM service.
- We will contact you with instructions to ship your original BCM to our facility.
- Our expert technicians will clone the critical data—including your vehicle’s VIN, security settings, and specific options—from your original module to this replacement unit.
- We ship the programmed replacement BCM back to you, typically ready for simple installation.
This process ensures that the replacement BCM is a perfect electronic match for your vehicle, saving you hundreds in diagnostic and programming fees. Plus, there is no core charge, so you can keep your original module.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his 2015 Sierra 2500 with a list of complaints that sounded like something out of a horror movie. The dome lights would flash randomly, the radio would shut off, and the door locks would cycle while driving. He’d already replaced the battery and checked all the grounds. After hooking up the scan tool, I saw a dozen communication error codes (U-codes) pointing to the BCM. Instead of sending him to a dealer for a new module and a hefty programming bill, we used this exact cloning service. Once we received the programmed module back and plugged it in, every single issue was gone. It’s a solution I’ve relied on for years because it’s reliable, cost-effective, and gets the customer back on the road without headaches.
Signs Your GM’s Body Control Module is Failing
A faulty BCM can cause a wide range of frustrating symptoms. If your vehicle is experiencing any of the following, your BCM is the likely culprit:
- ✔ Erratic or non-functional interior and exterior lights (headlights, taillights, dome lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ The horn sounding unexpectedly or not working when pressed.
- ✔ Dashboard warning lights appearing without a clear cause (check engine, ABS, airbag).
- ✔ Communication error codes stored in the system, often starting with ‘U’ (e.g., U0140 – Lost Communication With Body Control Module).
Your Straightforward Installation Guide
Once you receive your programmed module from us, installation is typically a direct swap. While the BCM location varies slightly by model, it’s generally accessible for a DIYer with basic tools.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: On most 2015 Sierra and Silverado models, the BCM is located under the steering column, on the driver’s side of the dashboard. On other models like the ATS or CTS, it may be on the firewall or hinge pillar. Consult a service manual for your specific vehicle’s location.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount your newly programmed BCM in the same location and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect Battery: Reattach the negative battery terminal.
- Post-Install Checks: Start the vehicle and test all related functions: lights, locks, windows, horn, and wipers. Note any warning lights on the dash.
Important Post-Installation Notes
In some cases, additional steps with a professional scan tool may be required:
- Airbag System Sync: If the airbag warning light is on after installation, the ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be necessary on some models to ensure proper brake light and traction control operation.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 13587704 and will also fit vehicles requiring part numbers: 13592137, 13506935, 13506936, and 13594764. It is confirmed to fit the following 2015-2018 GM models. Please match your part number or contact us to verify fitment.
- Cadillac ATS (2015-2016)
- Cadillac CTS (2015-2016)
- Cadillac Escalade & ESV (2015)
- Cadillac XTS (2015)
- Chevrolet Corvette (2015)
- Chevrolet Impala (2015-2016)
- Chevrolet Silverado 1500, 2500, 3500 (2015)
- Chevrolet Sonic (2015-2018)
- Chevrolet Suburban 1500 (2015)
- Chevrolet Tahoe (2015)
- GMC Sierra 1500, 2500, 3500 (including Denali) (2015)
- GMC Yukon & Yukon XL 1500 (2015)
Frequently Asked Questions
Why do I have to send you my original BCM?
Your original BCM contains vital security and vehicle-specific option data. By cloning this information to the replacement module, we ensure it works perfectly with your vehicle’s other computers, keys, and systems without needing expensive dealer programming.
How long does the programming service take?
Once we receive your original module, our cloning process is typically completed within 1-2 business days. We then ship the programmed replacement back to you.
Is this BCM difficult to install myself?
For someone with basic mechanical skills, the physical swap is straightforward. The BCM is usually held in by a few bolts or clips and has several plug-in connectors. The most important part is our pre-programming service, which handles the complex electronic work for you.
What if my airbag light comes on after installation?
This can happen occasionally. It means the new BCM needs to be electronically ‘introduced’ to the airbag system’s computer (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Do I need to return my old BCM for a core charge?
No. There is no core charge for this part. You only need to send us your original BCM for the data cloning service, and you are welcome to keep it afterward.
Will this fix my specific problem?
This module will correct issues directly caused by a faulty BCM. While the symptoms we’ve listed are common indicators, we always recommend proper vehicle diagnostics to confirm the BCM is the root cause before ordering.