2008-2013 CTS Body Control Module 15921353 with Cloning Service

Restore Full Functionality to Your Cadillac with a Plug-and-Play BCM

If you’re dealing with bizarre electrical issues in your 2008-2013 Cadillac CTS—like power windows with a mind of their own, malfunctioning door locks, a security light that won’t turn off, or even a no-start condition—the Body Control Module (BCM) is the most likely culprit. As the central command center for your vehicle’s body electronics, its failure can cause a cascade of frustrating and unpredictable problems. This isn’t just an inconvenience; it can be a serious safety concern when lights or security systems fail. This listing offers a direct-fit replacement BCM, pre-configured with our professional cloning service to get you back on the road without the high cost and hassle of a dealership visit.

What is Our Cloning Service?

A new BCM from the dealer requires expensive programming to sync it with your car’s unique Vehicle Identification Number (VIN) and specific options. Our cloning service eliminates this step entirely. You simply send us your original BCM, and we transfer all of its critical data—including VIN, mileage, and key programming—to this replacement unit. The result? A module that is 100% plug-and-play. No additional programming or calibration is needed for most vehicles. We’ll even ship your original module back to you with the ready-to-install replacement.

Common Signs of a Failing GM BCM

• ✔ Erratic or non-functional power windows, locks, and mirrors.
• ✔ Interior or exterior lights staying on or not working at all.
• ✔ The anti-theft or security system light flashing, preventing the car from starting.
• ✔ False warnings on the instrument cluster (e.g., ‘Service Airbag’).
• ✔ Communication loss codes, such as U0140 (Lost Communication With Body Control Module), stored in other modules.
• ✔ Unexplained battery drain when the vehicle is off.

A Straightforward Guide to Installation

1. ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait a few minutes for the system capacitors to discharge.
2. ✔ Locate the BCM: On the 2008-2013 CTS, the BCM is typically located on the left-hand (driver’s) side of the dash, often behind the lower trim panel. Refer to a service manual for the exact position.
3. ✔ Remove the Old Module: Carefully disconnect all electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
4. ✔ Install the New Module: Mount your new, cloned 2008-2013 CTS Body Control Module in place and securely reconnect all electrical harnesses. Ensure they click into place.
5. ✔ Final Steps: Reconnect the negative battery terminal. Turn the key to the ‘On’ position (without starting) and test all body functions—windows, locks, lights, etc. Note any post-install procedures that may be required for your specific vehicle.

Important Post-Installation Information

While our cloning service makes this a plug-and-play repair, some GM vehicles may require simple relearn procedures for full system integration:

• Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
• Brake Pedal Position Relearn: On certain models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.

Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step of the process.

Guaranteed Vehicle Compatibility

This module is a direct replacement for part number 15921353 and is compatible with a wide range of GM vehicles. It interchanges with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084. It fits the following models (please verify location and specific ID if noted):

Frequently Asked Questions