Holman HVAC Van Package - GM 135" Wheelbase Model 54GMSHolman HVAC Van Package GM 135" Wheelbase Model 54GMS HVAC professionals, we've got you covered with this package designed to maximize the capacity of your long wheel base van and accommodate the large amount of tools and parts. Sturdy adjustable shelf units include 2 large lockable storage compartments to secure larger, expensive tools and boxes. 7 heavy duty steel drawers and small part bin module help organize & contain a multitude of smaller tools