Call Freightliner in Gaffney, SC with the last 6 digits of your VIN. They can tell you if the fix was done already and will tell you if they still will replace your tank.
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Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
'17 Winnebago View 24V, '02 R-Vision B+
RVing for 19 years & 150,000+ miles