Posted 7/7/2025 23:35 (#11289939) Subject: DEF in Fuel???
Dagmar, MT
I got to thinking today about someone messing up & pumping a couple gallons of def into a fuel tank on a 3.0 duramax. Say it ran for a couple minutes, until a light came on. I'm thinking drain the fuel tank, change the fuel filters...hope for the best. Any suggestions?