Tired of Bizarre Electrical Problems in Your GM Truck?
As a technician with over two decades of experience, I’ve seen it all. Flickering dashboard lights, power windows with a mind of their own, a radio that cuts out randomly, or the dreaded “Service Stability System” message. These aren’t just annoyances; they’re classic signs of a failing Body Control Module (BCM), the central computer for your vehicle’s comfort and convenience features. When the BCM starts to go, it can feel like your truck is haunted. This isn’t just a part; it’s the solution to restoring order and reliability to your vehicle.
This listing is for a replacement BCM programmed specifically for your vehicle using our simple mail-in cloning service. You send us your original BCM, and we transfer all its vital data—including the VIN, mileage, and specific options—to a fully tested replacement unit. The result? A module that is truly plug-and-play, eliminating the need for expensive dealership programming or towing your truck to a shop. It’s the most efficient and cost-effective way to solve complex BCM issues.
A Technician’s Notebook: The Intermittent No-Start Sierra
A 2015 Sierra 1500 was brought to my shop with a maddeningly intermittent no-start condition. The battery was new, the starter checked out fine, but every few days, the owner would turn the key and get nothing but dashboard lights. He’d already spent hundreds replacing other parts. After connecting my scan tool, I noticed communication errors with multiple systems, all pointing back to a central hub. The culprit was a failing 2015 Sierra BCM. The internal processors were failing under certain temperatures, disrupting the security handshake with the key. By cloning his original module, we preserved the key data and had him back on the road permanently in two days, without a single extra programming fee.
Common Signs of a Failing BCM
If you’re experiencing any of the following, a faulty BCM is the likely cause. Look out for diagnostic trouble codes (DTCs) like U0140, U0155, or other ‘U’ codes, which indicate communication failures.
- ✔ 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 alarm going off randomly or preventing the vehicle from starting.
- ✔ Inaccurate gauge readings on the instrument cluster.
- ✔ Warning lights for the airbag, ABS, or traction control systems appearing without a clear cause.
- ✔ Complete communication loss, resulting in a no-start condition.
A Straightforward Guide to Installation
Our cloning service makes this repair accessible for both DIYers and professional shops. Once you receive your programmed module, installation is simple.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On most 2015 GM trucks like the Sierra and Silverado, the BCM is located under the steering column, behind the driver’s side lower dash panel. For other models, its location can vary (e.g., firewall, quarter panel).
- Remove the Old Module: Carefully disconnect all electrical connectors. They have locking tabs that must be depressed to be removed. Unbolt or unclip the module from its mounting bracket.
- Install the New Module: Seat the replacement BCM into the mounting bracket and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect the Battery: Re-attach the negative battery terminal.
- Test All Functions: Start the vehicle and test all body electronics: lights, wipers, power locks, windows, radio, etc., to confirm the repair was successful.
Important Post-Installation Information
While our cloning makes this a near plug-and-play process, some vehicle systems may require a relearn procedure after the BCM is replaced. This is standard for modern vehicles. Please be aware of the following:
- Airbag System Sync: If the airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system. This is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be required to ensure brake lights and the traction control system function correctly.
Disclaimer: Always consult a factory service manual or a qualified technician if you are unsure about any step. Specific procedures can vary slightly by exact make and model.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for part number 13506935 and is compatible with other part numbers such as 13592137, 13506936, 13587704, and 13594764. It is verified to fit the following models:
- 2015 GMC Sierra 1500 / 2500 / 3500 & Denali Models
- 2015 Chevrolet Silverado 1500 / 2500 / 3500
- 2015 Chevrolet Suburban / Tahoe
- 2015 Cadillac Escalade / Escalade ESV
- 2015 GMC Yukon / Yukon XL
- 2015 Cadillac ATS / CTS / XTS
- 2015-2016 Chevrolet Impala (New Style)
- 2015-2018 Chevrolet Sonic
- 2015 Chevrolet Corvette
Please match your part number or vehicle in this list to ensure compatibility. Our cloning process guarantees it will work with your vehicle’s specific options.
Frequently Asked Questions
Frequently Asked Questions
How does the mail-in programming service work?
After you purchase, we will contact you with simple instructions and a shipping address. You mail your original BCM to us. We then clone its data to the replacement module and ship it back to you, typically within 1-2 business days of receiving your original part.
Is this really plug-and-play?
Yes, for over 95% of installations. Because we transfer your vehicle’s original data, no additional programming is needed to start the car and operate basic functions. In rare cases, as noted above, a relearn procedure for the airbag or brake sensor may be needed.
Do I need to send my keys?
No. Since we are cloning the data from your original module, all the security information that recognizes your existing keys is transferred over. Your current keys will work perfectly.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM is failing, we can still extract the necessary data. If your module is severely damaged (e.g., by fire or water), please contact us before ordering to discuss options.
Do I have to pay a core charge or send my old part back?
You must send your original module to us for the cloning service, but there is no separate core charge. We perform the service and ship the programmed replacement back to you. You will not get your original module back.
Will this fix my specific problem?
This part corrects issues caused by a faulty BCM. It’s crucial to properly diagnose the problem first. If you’re experiencing the symptoms listed above (erratic electronics, communication codes), a failing BCM is the most likely cause.