Just wondering, what brand DEF do you all use? My truck is the 2021 3.0 so I was wondering if it matters. I know years ago GM tried to tell everyone they needed to use specific DEF or it would damage the system. Thanks
Happy to have found a forum to go to for help and info on my 2021 3.0 Max. First time owning a diesel but have strong mechanical back ground so should be fun. Looking forward to having discussions with you all.