Tired of Unpredictable Electrical Gremlins in Your GM Truck?
As a technician with over two decades of diagnostic experience, I’ve seen it all. Flickering dashboard lights, power windows with a mind of their own, a radio that cuts out randomly, or worst of all, a truck that refuses to start. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM). The BCM is the central command for your vehicle’s body electronics, and when it starts to go, it can cause a cascade of frustrating and seemingly unrelated issues. Replacing it used to mean a costly trip to the dealership for installation and programming. Not anymore.
This is a complete, plug-and-play solution for your vehicle. We provide a quality replacement BCM, part number 13506936, that is professionally programmed with the data from your truck’s original module. This cloning process ensures that all your vehicle-specific settings, including key information and factory options, are transferred perfectly. The result? You receive a module that’s ready for installation right out of the box, bypassing the need for expensive dealer-only programming tools and saving you significant time and money.
A Technician’s Notebook: The Case of the Haunted Sierra
A 2015 Sierra 2500 came into my bay with a bizarre list of complaints. The dome lights would stay on, the driver’s power seat wouldn’t adjust, and intermittently, the truck wouldn’t crank. The owner had already replaced the battery. My initial scan showed a slew of U-codes, specifically a U0140 (Lost Communication With Body Control Module). Instead of just throwing parts at it, we checked the BCM’s power and grounds—they were solid. The communication network lines were clean. This pointed directly to an internal failure in the BCM itself. By providing a pre-programmed module, we had the customer back on the road the same afternoon, avoiding a multi-day wait and a hefty programming bill from the dealer.
Is Your Truck Showing These Symptoms?
- ✔ Unresponsive or erratic power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Dashboard warning lights illuminate for no reason.
- ✔ Communication error codes, such as U0140, U0155, or other U-series codes, are present.
- ✔ The radio or infotainment system behaves erratically or doesn’t power on.
- ✔ Horn doesn’t work or goes off unexpectedly.
Your Straightforward BCM Installation Guide
Installing your new BCM is a manageable job for a confident DIYer or any professional technician. The location is typically under the steering column on the driver’s side.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- Locate the BCM: On most Sierra/Silverado models, it’s mounted to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect Connectors: Carefully release the locking tabs on each of the electrical connectors and pull them straight out. Never force them. Note their orientation for easier reinstallation.
- Remove the Old Module: Unbolt or unclip the original BCM from its mounting bracket.
- Install the New Module: Mount your pre-programmed replacement BCM securely in place.
- Reconnect Everything: Plug all electrical connectors back into the new BCM until they click firmly into place. Reinstall any trim panels and reconnect the negative battery terminal.
Important Post-Installation Steps
Our programming service handles the critical vehicle data, but some systems may require a ‘handshake’ with the new module. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level scan tool. This is a security measure to ensure the systems are correctly paired.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be needed to ensure correct brake light operation and to satisfy the traction control system.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or a qualified professional if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. It is guaranteed to fit the following models:
- 2015 Cadillac ATS, CTS, Escalade, Escalade ESV, XTS
- 2016 Cadillac ATS, CTS
- 2015 Chevrolet Corvette, Impala (New Style), Silverado 1500/2500/3500, Sonic, Suburban 1500, Tahoe
- 2016-2018 Chevrolet Sonic
- 2015 GMC Sierra 1500, Sierra Denali 1500
- 2015 GMC Sierra 2500/3500 Pickup & Denali 2500/3500
- 2015 GMC Yukon & Yukon XL 1500
Frequently Asked Questions
How does the programming service work?
After you place your order, we will contact you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the necessary data and program it into the replacement module. We then ship the ready-to-install BCM back to you.
Will this fix my no-start problem?
A failing BCM is a very common cause of no-start or intermittent starting conditions related to the vehicle’s anti-theft system. If your vehicle’s security light is on, this module is a likely solution. However, you should always perform a proper diagnosis to rule out other issues like the battery or starter.
Do I need any special tools for installation?
Basic hand tools like a socket set and trim removal tools are usually all that’s needed for the physical installation. However, as noted, a professional diagnostic tool may be required for post-installation procedures like an airbag system sync if the warning light appears.
Is there a core charge?
No, there is no core charge. We only need your original module to perform the data cloning service. You are welcome to keep it afterward.
How long does the whole process take?
We typically program and ship your replacement module within 1-2 business days of receiving your original BCM. The total time will depend on shipping transit times to and from our facility.