About 1 minute before you shut the truck off, turn off the AC and just let the fan run. You are getting condensation in the vent piping from running the AC. If you run the vent fan for a minute before shutting down, it will help to dry the piping before you shut it off.
A forum community dedicated to Diesel engine owners and enthusiasts. Come join the discussion about performance, builds, ecodiesel, towing capacity, modifications, classifieds, troubleshooting, maintenance, and more!