Update:
The pump I ordered from previous post works like a champ. If you need to reach the spare tire stored on the back it would need an extension but on the E350 chassis it reaches all tires.
Added 3 pounds of air to a tire in about 20 seconds.
Also the simulators are just pry off at the edge, once off it is possible for me to reach the valve stems. Thanks everyone for recommendation on pump, I will feel much safer riding down the road knowing I can air up my tire to the proper pressure before and during a trip.
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