DEF Level Stuck at 24%
My DEF level was at 17% so I added a 2.5gal jug of DEF. The level went to 24% and has not changed. I drove 750 miles and it is still at 24%. I added another 2.5gal jug of DEF and the level is still at 24%. I searched this forum and didn't find anything related to this. Has anybody experienced this? What is the fix?
2016 GMC Sierra 2500HD SLT CC/SB LML
- Drop Shackle @ 1" drop
- B&W Gooseneck Hitch