gobbledott

I am new to def but similar problems. Mine was filled by the dealer and only showed about 1/3 on the vertical scale and showing def ok. First warning came showing 525 miles left, followed by one at 225 miles showing def low. Gauge never moved. Put in 2 1/2 gal. still no movement. Talked to the dealership and the guy tried to convince me that there was no gauge there. I will be dropping in to see him in person. Anyone with a similar problem ? 2019 Silverado, duramax diesel

Just got a new (to me) 2019 Chev. Silverado 2500. While going over everything I noticed that the front grill has an opening that seems to expose the radiator to debris. Does anyone know of anything that would work to close it off from the debris and yet will all that extra airflow.