william.m
New Member
- Sep 25, 2021
- 10
- 1
- Truck Year
- 2015
I bought my truck used with a tune already installed. All I know is that the DEF gauge reads empty and I have never added any and I get no errors or anything of the such. I did look under the truck and noticed my exhaust said Bosch on it, is that stock? How can I figure out what tune I have?