if its loosing pressure it will do that.smelling any gas fumes at all?..a check engine light might be around the corner...
Put the key in run.. but don't start // do u hear the fuel pump come on for a few seconds then go off? if it does than the fuel pump is working but You may have a weak fuel pump and have to wait until your gas tank gets pressure (when U got gas u lost fuel tank pressure after U removed the gas cap) Just a guess that combined get gas and hard start
Looking for a Used Yukon in your area?
CarGurus has 21,028 nationwide Yukon listings starting at $1,495.
Search GMC Yukon Questions
GMC Yukon Experts
Related Models For Sale
Used Cars For Sale