Same problem with the DEF line I posted about here. I was also throwing codes for an electrical problem and not just the low DEF pressure. When the second code came back for the pressure low I asked if they had a Duramax certified diesel tech that could take a look at the car and he visually spotted it within an hour of me leaving the dealer. Only took a few days to get the new line.
I'll eventually get around to posting a review thread comparing my new diesel hatch to my first gen diesel sedan, but I can say I'm not super impressed with the build quality of the Mexican made hatches compared to the sedans built in Ohio. Maybe they're having teething problems but they've been building the gas models a while now and my car had numerous trim items also sloppily installed.
I'll eventually get around to posting a review thread comparing my new diesel hatch to my first gen diesel sedan, but I can say I'm not super impressed with the build quality of the Mexican made hatches compared to the sedans built in Ohio. Maybe they're having teething problems but they've been building the gas models a while now and my car had numerous trim items also sloppily installed.