Restore Your Truck’s Brain and End Electrical Frustration
If you’re dealing with bizarre electrical issues in your 2015 GMC Sierra Denali 3500 or another compatible GM vehicle, you know how maddening it can be. Lights flickering, power windows with a mind of their own, or a dashboard that looks like a Christmas tree are classic signs of a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, a faulty BCM can turn your reliable workhorse into a source of constant headaches. This isn’t just an inconvenience; it can affect vehicle security and drivability.
Forget expensive dealership visits and the hassle of programming a new module from scratch. We offer a straightforward, reliable solution: a replacement BCM with part number 13594764 that arrives at your door pre-programmed and ready for installation. We use our specialized cloning service to transfer the exact data from your original BCM to this replacement unit. This means your vehicle’s specific configuration, key information, and security settings are perfectly preserved. The result is a true plug-and-play fix that gets you back on the road with confidence.
A Technician’s Notebook: The Intermittent Gremlin
I remember a 2015 Silverado 2500 that came into the shop with the most baffling symptoms. The owner said one day the radio wouldn’t turn off, the next day the dome lights would stay on, and occasionally the turn signals would just quit. He’d already replaced the battery and checked all the fuses. We ran diagnostics and found a slew of communication error codes (U-codes), all pointing to a network issue. After chasing wires for an hour, we hooked up a scope to the BCM’s communication lines. We saw the data signal dropping out intermittently. The BCM was failing internally, but only under certain conditions. Instead of a costly dealer replacement and programming, we used a cloned 2015 Sierra Denali BCM (same family) and had the truck fixed in under an hour after receiving the part. The customer was thrilled to have his truck back to normal without the huge bill.
Common Signs of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system acting up, or the key fob not responding.
- ✔ Dashboard warning lights appearing randomly (e.g., Service StabiliTrak, Airbag).
- ✔ Communication-related Diagnostic Trouble Codes (DTCs), such as U0140, U0155, or U0100.
- ✔ The engine may crank but not start due to the BCM not communicating with the immobilizer system.
Your Straightforward Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most 2015 GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, near the steering column. On other models like the ATS or XTS, it may be on the firewall or hinge pillar.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors from the module. They have locking tabs that need to be pressed to release. Once disconnected, unbolt or unclip the old BCM and remove it.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all the electrical connectors. You should hear a click as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, windows, locks, radio, etc.—to confirm the repair.
Important Post-Installation Notes
While our cloning service makes this a plug-and-play process, some vehicle systems may require a ‘handshake’ with the new BCM. If your airbag light is on after installation, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. Similarly, a Brake Pedal Position relearn might be necessary on some models to ensure proper brake light and traction control operation. Always consult a factory service manual for your specific vehicle if you are unsure.
Guaranteed Fitment for Your GM Vehicle
This BCM is a direct replacement for part number 13594764 and is compatible with several other part numbers including 13592137, 13506935, 13506936, and 13587704. It is verified to fit the following 2015-2018 General Motors vehicles:
- Cadillac: ATS, CTS, Escalade, Escalade ESV, XTS
- Chevrolet: Corvette, Impala, Silverado 1500/2500/3500, Sonic, Suburban 1500, Tahoe
- GMC: Sierra 1500/2500/3500, Sierra Denali 1500/2500/3500, Yukon, Yukon XL 1500
Please verify your original part number or consult the detailed fitment list to ensure compatibility. This is the correct 2015 Sierra Denali BCM and for many other models listed.
Frequently Asked Questions
How does the programming service work?
After you purchase, we will contact you with instructions to ship your original BCM to us. Once we receive it, we transfer its data to the replacement module and ship the new, programmed unit back to you. This preserves all your vehicle’s settings.
Why is this better than going to a dealership?
Our service saves you significant money and time. You avoid dealership labor rates and the high cost of a new, un-programmed module. Plus, our solution is plug-and-play, eliminating the need for a tow or a special programming appointment.
Do I need to send my keys or any other parts?
No. We only need your original Body Control Module. By cloning the data directly from it, all your existing keys and remotes will work perfectly with the replacement BCM.
What is the turnaround time?
We typically program and ship your replacement BCM within one business day of receiving your original module. You will receive a tracking number as soon as it’s on its way back to you.
What if the airbag light comes on after I install it?
This can happen occasionally. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A repair shop with a professional diagnostic tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Is there a core charge for my old BCM?
No, there is no core charge. We need your original module to perform the data transfer service, but you are not charged a separate core fee.