How to Update Dell Drivers and BIOS During SCCM OSD
Download Dell command update & XML file & create Packages: Download Dell Command Update Do not download the Universal Windows Platform version
Copy it to your SCCM Source content along with the below XML file.
Keep in mind this file may need to be regenerated if its too old.
You will need to create an Application for Dell Command Update. You can ether import the .exe you get from dell or extract the .