Are you battling frustrating electrical issues in your GM vehicle? Flickering lights, malfunctioning power windows, a stubborn security system, or an unresponsive key fob are all 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 fails, it can cause a wide range of perplexing problems. This VIN-programmed BCM, part number 20839063, is the definitive solution to restore full functionality and peace of mind to your driving experience.
We had a 2008 Cadillac DTS come into the shop with a laundry list of complaints. The owner said the radio would sometimes not turn on, the power door locks worked intermittently, and the ‘Service Theft System’ message was constantly on the dash. After checking fuses and wiring, we connected our diagnostic tool and found multiple communication loss codes pointing to the BCM. Instead of a costly and time-consuming trip to the dealer, we installed one of our pre-programmed BCMs. Within an hour, all the electrical gremlins were gone, and the car was functioning perfectly. This is a common story for these vehicles, and a properly programmed BCM is the key to a lasting repair.
Common Symptoms of a Failing GM BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Instrument cluster gauges behaving strangely or not working at all.
- ✔ ‘Service Theft System’ or other security-related warnings on the dash.
- ✔ Interior or exterior lights staying on, flickering, or failing to turn on.
- ✔ Keyless entry remote (key fob) not working.
- ✔ Unexplained battery drain when the vehicle is off.
- ✔ Communication errors (U-codes) stored when scanned with a diagnostic tool.
Restoring Functionality with a Programmed 2006-2011 DTS BCM
Don’t let a faulty module keep your car off the road. This BCM is a direct-fit replacement for a wide range of GM vehicles, including the 2006-2011 Cadillac DTS, Chevy Impala, GMC Acadia, and many more. The most significant benefit is our complimentary programming service. Simply provide your vehicle’s 17-digit VIN during checkout, and our technicians will flash the module with the latest GM-approved software specific to your car’s options and features. This eliminates the need for expensive dealer programming, making the installation process as simple as plug-and-play.
This module is a direct replacement for numerous part numbers, including: 10382479, 15819552, 15921352, 20815898, 22860591, 25892622, and many others listed in the fitment guide. There is no core charge, so you can keep your original part.
Installation and Post-Install Notes
While installation is straightforward for many, please be aware of potential post-installation procedures. Depending on your specific vehicle, a couple of relearn procedures may be necessary:
- Airbag System Sync: If the airbag light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional scan tool to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure proper brake light and traction control operation.
We always recommend consulting a factory service manual or a qualified technician if you are unsure about any part of the installation process.
Frequently Asked Questions
Do I need to program this BCM?
No. We handle the programming for you before we ship the part. Just provide your vehicle’s VIN during or after checkout, and it will arrive ready to install.
How do I give you my VIN?
You can add your 17-digit VIN in the notes section at checkout or send it to us in a message after you complete your purchase. We cannot ship your part until we receive the VIN.
My original part number isn’t 20839063. Will this still work?
Yes, this BCM replaces a long list of interchangeable GM part numbers. Please check the detailed part number list in our description to confirm that your original number is included.
Will this fix my ‘Service Theft System’ light?
A faulty BCM is the most common cause of a persistent ‘Service Theft System’ message on these GM vehicles. Replacing it with this pre-programmed module is the correct and most effective solution for that issue.
What if an airbag light appears after I install it?
This can happen on some vehicles. It simply means the new BCM needs to be electronically introduced to the airbag module. A technician with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.