Are you experiencing frustrating and unpredictable electrical problems in your 2006-2011 Cadillac DTS? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts up on its own are often traced back to a single component: 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 wide range of confusing symptoms. This replacement Body Control Module, part number 20921436, is the definitive solution to restore your Cadillac’s functionality and peace of mind.
We make the repair process simple. Unlike a trip to the dealership, which involves high costs for parts, labor, and programming, our module arrives at your door ready for installation. We professionally program the BCM with the latest GM software updates, specifically matched to your vehicle using the VIN you provide at checkout. This eliminates the need for expensive scan tools or a visit to a mechanic for programming, saving you time and money.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ Vehicle security system engaging randomly or not at all.
- ✔ Key fob not being recognized or functioning intermittently.
- ✔ Instrument cluster gauges behaving erratically or displaying warning lights.
- ✔ Problems with the radio or climate control systems.
- ✔ A/C compressor clutch not engaging.
Installation and Post-Install Steps
Physically replacing the BCM is straightforward. It is typically located in the right-hand center dash area on the Cadillac DTS. Once the new module is installed, it will be pre-programmed for your vehicle’s main functions. However, depending on your vehicle’s specific configuration, a couple of additional relearn procedures may be necessary.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a technician will need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a professional-grade scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: In some cases, a brake pedal position sensor recalibration may be required to ensure proper brake light operation and to satisfy the traction control system.
This module is a direct replacement for a wide range of GM part numbers, including: 10382479, 15093910, 15276271, 15819552, 20921436, 22860591, 25892622, and many more. It also fits an extensive list of other GM vehicles such as the Chevy Impala, GMC Acadia, Chevy Traverse, and Buick Lucerne, making it a versatile and reliable solution.
Frequently Asked Questions
Do I need to program this DTS Body Control Module?
No. We handle all the programming for you before shipment. Simply provide your vehicle’s VIN during checkout, and the module will arrive ready to be installed with the latest software for your specific car.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your car. We use it to access the exact factory specifications and software for your vehicle, ensuring the BCM is programmed perfectly for your specific options and features.
What happens if my airbag light is on after installation?
This is a normal security measure. The BCM needs to be electronically ‘introduced’ to the airbag’s Supplemental Deployment Module (SDM). A repair shop with a professional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the modules and turn off the light.
Is this a difficult part to replace myself?
The physical replacement is generally straightforward for someone with basic mechanical skills, as it involves removing a few dash panels and unplugging the old module to plug in the new one. However, be aware that post-installation procedures like the airbag sync may require a professional scan tool.
Is there a core charge for my old part?
No, there is no core charge. You can keep your original module without needing to send it back to us.