Fuel Filler Prep, Silverado 2500, MY22+ 1 Step 1 of 5 Identify the master it is number 88 2 Step 2 of 5 Pre fit hoses to tray 3 Step 3 of 5 Blue hose 550mm 4 Step 4 of 5 With 60 degree bend and reducer 5 Step 5 of 5 Breather has reducer, larger at one end. red hose (12.7mm) is 710 mm long.