Fuel cell questions

[Huck]

Randy, the vent is just as described. All the trucks thru 70 had vented systems---some were vented in the cab via a line that ran up and down in the pass side B pillar. Blazers have a vent line that runs up next to the filler hose. The later models had like 3 freakin lines running up into a tube (1.5") that was mounted next to the filler access square thingy. You need a vent in the tank and that is what this is. All you need to do is attach a fitting, then a "fuel line" hose to a high point that will allow air to enter and fuel to vent in the case of an overfill. You also want this line to not allow water or dirt to enter thus a check valve similar to those used on rear ends vent lines.