Restore Your Truck’s Brain, Not Your Wallet
Are you chasing electrical gremlins in your 2015 Sierra Denali 1500? Flickering lights, windows with a mind of their own, or a security light that won’t quit are classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of frustrating, seemingly unrelated problems. Dealerships will often quote you a staggering price for a new module plus hours of labor for programming. We offer a smarter, more affordable solution.
This is a professionally programmed BCM, ready for installation. Our process is simple: you purchase this service, ship your original BCM to us, and we handle the rest. We will meticulously transfer all the critical vehicle-specific data—including VIN, mileage, and key information—from your old module to this replacement unit. The result is a true plug-and-play part that restores full functionality without requiring a trip to the dealer for expensive programming. This service is the most reliable way to get your truck back to 100%.
From the Diagnostic Bay: The Case of the Haunted Sierra
A customer brought in his 2015 Sierra 1500 with a list of bizarre symptoms. The radio would randomly turn off, the dome light would flicker while driving, and occasionally, the power locks wouldn’t respond. He’d already replaced the battery and checked grounds, but the problems persisted. After connecting my scan tool, I saw multiple communication error codes (U-codes) pointing to the BCM. Instead of a costly new module from the dealer, we used our cloning service. Once the programmed replacement BCM was installed—a 15-minute job—every single issue was gone. It’s a fix I’ve performed hundreds of times; it’s reliable, fast, and saves the customer a significant amount of money and frustration.
Is Your GM Vehicle Showing These BCM Failure Signs?
- ✔ Erratic or non-functional interior/exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors not working correctly or at all.
- ✔ The security system light stays on, or the vehicle won’t start due to an anti-theft issue.
- ✔ Wipers turning on by themselves or not working when commanded.
- ✔ Horn sounding unexpectedly or not working at all.
- ✔ Communication error codes stored, such as U0140, U0155, or other U-series codes.
- ✔ False warnings appearing on the driver information center (DIC).
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most GM trucks like the Sierra and Silverado, the BCM is located under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- ✔ Disconnect the Module: Carefully unplug all the electrical connectors from the old BCM. The connectors have locking tabs that need to be depressed to be released. Do not force them.
- ✔ Swap the Modules: Unbolt or unclip the old BCM from its mounting bracket and install the new, programmed module in its place.
- ✔ Reconnect and Test: Plug all connectors firmly back into the new BCM. Reconnect the battery terminal. Turn the key to the ‘ON’ position and test all body functions—lights, locks, windows, wipers, etc.—to confirm the repair.
Important Post-Installation Checks
While our cloning service makes this a near plug-and-play repair, some vehicle systems may require a quick sync. After installation, please be aware of the following:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a simple ‘Setup SDM Primary Key in BCM’ procedure is needed. This requires a professional-grade scan tool to sync the new BCM with the airbag system and extinguish the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary. This ensures your brake lights and traction control system function as intended. This is also performed with a capable scan tool.
Disclaimer: Procedures can vary slightly by model. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Fitment for a Wide Range of GM Models
This BCM is a direct replacement for part numbers 13592137, 13506935, 13506936, 13587704, and 13594764. It is guaranteed to fit the following vehicles:
- 2015 Cadillac ATS, CTS, Escalade, Escalade ESV, XTS
- 2016 Cadillac ATS, CTS
- 2015 Chevrolet Corvette, Impala (New Style), Silverado 1500/2500/3500, Suburban 1500, Tahoe
- 2015-2018 Chevrolet Sonic
- 2015 GMC Sierra 1500, Sierra 2500/3500
- 2015 GMC Sierra Denali 1500, Sierra Denali 2500/3500
- 2015 GMC Yukon, Yukon XL 1500
Frequently Asked Questions
What exactly is a BCM cloning service?
It’s a process where we transfer the unique, vehicle-specific software from your original BCM to a replacement unit. This makes the new part recognize your vehicle’s keys, security system, and specific options, eliminating the need for dealer programming.
How long does the process take after you receive my module?
We pride ourselves on a fast turnaround. Once we receive your original BCM, the cloning process is typically completed and the new module is shipped back to you within 1-2 business days.
Is this something I can install myself?
Absolutely. For most DIYers with basic tools, this is a straightforward installation. The BCM is usually accessible under the dashboard and involves unplugging the old unit and plugging in the new one. See our guide above for the general steps.
Do I have to send my old part back? Is there a core charge?
You only need to send your original BCM to us for the initial data cloning. There is no core charge, and you can keep your original module after the service is complete.
What if the airbag light comes on after I install it?
This is a known possibility. It simply means the new BCM needs to be synced with the airbag module. A technician with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.