DEF empty warning, but DEF tank is FULL.. Anyone have this issue?

There a currently 20 i know of in ND. All with Max Towing gears... 3.73.. it is a math error in the computer and they can't figure it out. I am beyond sad...
 
My truck has this issue every now and then. I was told the system might need to be reflashed, but now I’m seeing that might not be the fix.
 
I recently had the same issue on my 2021, took to local dealer and they ordered a replacement DEF tank. This is apparently a known issue within the GM tech circle.
My DEF level would go from 3/4 to empty saying xx miles to limp mode and after a couple days would show correct level. Take it in when the issue is there if possible and have them scan it for codes.
Mine threw a code that they caught in the service dept.
 
You must log in or register to reply here.
Back
Top