I got a code on my bulldog gt tuner in a 2015 Chevy duramax. What is the code for?

Question

Bully dog GT tuner installed on pickup. Remote start didn't work this morning. Only 20 degrees out, but it's never been an issue in the cold before.

Answer 1

Was there any code that was set, even with the tuner it may not be the problem , gather the code  that is set. this will help point the problem , There been cases when the remote start is inoperative and the lift gate is inoperative, and the problem is with the Body control module. in either case you need to gather the code that is set.