- If you are not installing the device on a 2011 or newer Duramax, then please go to "Change Vehicles" at the top of the main menu, and select the correct vehicle application.
- If the vehicle is a 2011 or newer Duramax, make sure the device is up to date with the latest version. Click here for instructions on updating.
If you continue to have this issue, please get in touch with us at techsupport@derivesystems.com or visit our chat option on our site, bullydog.com. Make sure you have access to a windows based pc, the device, and the vehicle when you do. Thanks.