Def fluid
Have a 2011 Duramax. Have had a sensor problem. Dealer says the def from Walmart is giving some problems. Any thoughts.
Forum Discussion
I’ve got a 2011 had a DEF pump go out, a sensor go out and a tank leak all in the first year. No problems since. The dealership told me to buy my DEF at places where they sell a lot of it. You don’t want to use old stock that has been sitting on the shelves for a long time.
