I got the stainless steel braided hose at Lowes. I took the floor of the island off under the sink then I cut an access hole in the floor underneath the island. I hooked the old plastic line to the new ss hose with a brass fitting. I taped them both together with electrical tape about 6" up on each line. It takes two people to pull it out to the outside of the unit, the person on the inside holding tension as the person on the outside pulls the hose. Then you just route it up to the refrigerator like the plastic hose is run.
2015 31SL: 2015 CHEVROLET 3500 SILVERADO HIGH COUNTRY DURAMAX DIESEL CREW CAB