Uploaded November 2023 | Updated September 2026, 2 weeks ago
Today I will offer my rant about how unhappy I am with the LOW DEF notification on my 2021 GMC Denali with a 3.0 Diesel.
Without any earlier warning a screen popped up saying "DEF Empty Refill Now" and a screen sating "500 miles left to 65 MPH Max"
I am ok with a warning once in a while but GM has disabled any option to acknowledge and hide the warning screens. It takes over the main screen and does not allow you to see or adjust any other options until you fill it with DEF.
Today I will offer my rant about how unhappy I am with the LOW DEF notification on my 2021 GMC Denali with a 3.0 Diesel.
Without any earlier warning a screen popped up saying "DEF Empty Refill Now" and a screen sating "500 miles left to 65 MPH Max"
I am ok with a warning once in a while but GM has disabled any option to acknowledge and hide the warning screens. It takes over the main screen and does not allow you to see or adjust any other options until you fill it with DEF.
