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 have had sensors, DEF tank and heater/pump replaced, all on DEF Blue from NAPA. I switched to WM brand 15,000 miles ago an no issues. 105,000 on my 2012 Duramax I bought new.
