Have 2016 Cadillac ATS BCM to read pin code by OBDII, the best tool is OBDSTAR key master (Also named X300 Pro3 sold on Eshop)
Car info: 2016 Cadillac ATS BCM
Tool to use
X300 Pro3 full package(Another name of key master and sold on the Eshop)
First, attach a video for you to see this process:
Open OBDSTAR key master, go to option “Vehicles”.
Choose “GM V31.02”.
Loading… Initializing… Authorizing…
Choose “Read Security code”.
Choose “By OBDII”
Choose “By BCM system”
Choose “Read password”
Password is read out as 4907
Next is to show how to read the GM pin code manually.
Press the red button “Enter” and it displays “Read password”, press the “Esc” button.
Press the down button to choose “Manual”, then the “Enter” button.
Read message “BCM type: Continental 70F3558 +95320 (25320).”
Choose ” Continental 70F3558 +95320 (25320)”, press “Enter”.
Reading password successfully, it is 4907.
Therefore no matter what method to use obdstar to read the pin code on GM Cadillac ATS BCM, the result is the same.