Is Your Cadillac Experiencing Strange Electrical Problems?
The Body Control Module, or BCM, is the central command center for your vehicle’s body electronics. It manages everything from your power windows and door locks to the interior lights, security system, and even communication between other modules. When the BCM starts to fail in your 2015-2016 Cadillac CTS or other compatible GM vehicle, it can cause a cascade of confusing and frustrating issues that can be difficult to diagnose.
From the Diagnostic Bay
We had a 2015 Cadillac CTS come into the shop with a list of bizarre symptoms. The owner reported that the radio would randomly turn off, the dome lights would flicker while driving, and the key fob would only work intermittently. There were no consistent trouble codes, making it a real head-scratcher. After checking all the grounds and power feeds, we focused on the BCM. By swapping in a known-good, programmed module, every single one of the ghost-like electrical problems vanished. It’s a perfect example of how a failing BCM can wreak havoc on an otherwise perfectly good vehicle.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, locks, or mirrors.
- ✔ Interior or exterior lights staying on, not working, or flickering.
- ✔ The security system or alarm acting up or preventing the car from starting.
- ✔ Key fobs not being recognized or working inconsistently.
- ✔ Instrument cluster gauges behaving erratically or warning lights appearing for no reason.
- ✔ Communication errors with other vehicle modules (DTC U-codes).
- ✔ Issues with the HVAC (heating and air conditioning) controls.
Your Plug-and-Play Solution for the 2015-2016 CTS BCM
Replacing a BCM isn’t as simple as just swapping the part. A new module from the dealership requires expensive programming to sync it with your vehicle’s specific VIN and security information. Our professional programming service eliminates this step entirely. We take the critical data from your original BCM and transfer it directly to this replacement unit. The result is a fully functional, plug-and-play module that is ready for installation right out of the box, saving you hundreds of dollars and a trip to the dealer.
How The Process Works:
- ✔ Place Your Order: Purchase this BCM programming service.
- ✔ We’ll Contact You: We will reach out to you with clear instructions and a shipping address. Please ensure your contact information is up to date.
- ✔ Ship Us Your Module: Carefully package and send your original BCM to our facility.
- ✔ We Program Your New BCM: Upon receipt, our technicians will clone the data from your original module to the replacement unit, typically within 1-2 business days.
- ✔ Receive Your Ready-to-Install Part: We ship the programmed BCM back to you. Simply install it, and you’re back on the road!
Post-Installation Information
While our goal is a seamless plug-and-play experience, some GM vehicles may require minor recalibration procedures after installation. These can often be performed by a local mechanic with a professional-grade scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the modules. This is only required if the light is on.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be necessary for proper brake light and traction control operation.
This BCM is a direct fit for part numbers: 13592137, 13506935, 13506936, 13587704, and 13594764. It is compatible with a wide range of 2015-2018 GM vehicles, including the Corvette, Impala, Silverado, Sierra, Tahoe, Suburban, Escalade, ATS, XTS, and Sonic. Please verify your part number and check the fitment list to ensure compatibility.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors various electronic accessories, such as power windows, locks, lights, wipers, and the security system. It acts as a central hub for these functions.
How does your programming service work?
You purchase this service and mail your original BCM to us. We extract the vehicle-specific data (like VIN and key information) from your module and flash it onto the replacement unit. This makes the replacement module a direct, plug-and-play copy of your original.
Is this truly a plug-and-play installation?
Yes, in over 99% of cases. Because we clone your original data, the vehicle recognizes the new module as its own, eliminating the need for dealership programming. In rare instances, a minor relearn procedure like for the brake pedal sensor may be needed.
What if my original BCM is completely dead or unreadable?
In cases of severe damage (fire, water, etc.), data recovery may not be possible. Please contact us before purchasing if you suspect your module is unreadable. We can discuss alternative solutions.
Do I need to return my old BCM after I receive the new one?
No, there is no core charge for this item. We use your original module solely for the data transfer process. We will ship it back to you along with the newly programmed replacement unit.