jethroish

Just bought new 2015 3500 4x4 SRW (pics will be coming). Coming up on 1000 miles and DEF gage still says 100% from when I brought it home with 35 miles on it. Seems a little odd. Got jug of DEF and it took 1 to 1.5 gallons. Seems the gage should have been down to 3/4. Normal? Or does it need to go to service dept?

DodgeCowboy

I have drove over 600 miles this last weekend and my guage stays at 100% it usually takes thousands of miles before you get under a half tank, I usually go down to little under half tank then top off with a 2.5 gallon jug.

RyeThomas

Because DEF freezes they couldn't use a standard float style gauge, so it has some type of beam style (like laser beam, lol). It has been reported that the gauge reads full till 1/2 tank and then starts to move, but as stated 1/2 tank can be 1000's of miles. I wouldn't be worried, it's seems quite normal for it to sit on full a long time.

hubmonkey

My 15 2500 DEF gauge did not move for well over 1k miles. When I hooked up my trailer and drove it 75mph on the turnpike it moved then... Have about 2500 miles on the truck now and the DEF gauge shows half full now.

Hub