Chevy and GMC Duramax Diesel Forum - View Single Post - Help smoking after down grade
View Single Post
post #2 of (permalink) Old 09-09-2019, 04:11 AM
Junior Member
Join Date: Sep 2018
Posts: 83
White smoke is coolant. Check your coolant level and also take the truck for a 15 minute hard run and see if the upper radiator hose is rock hard. If so it is head gasket time.
Gatordog is offline  
For the best viewing experience please update your browser to Google Chrome