Hi uga bulldog 25 this is lostrider, there are 3 different types of fitting there installing on these trucks, here is the procedure for the quick disconnect liens, hope this is what you have in your truck.
WARNING: The evaporative emission system contains fuel vapor and condensed fuel vapor. Although not present in large quantities, it still presents the danger of explosion or fire. Disconnect the battery ground cable from the battery to minimize the possibility of an electrical spark occurring, possibly causing a fire or explosion if fuel vapor or fuel liquid is present in the area. Failure to follow these instructions may result in personal injury.
CAUTION: Fuel injection equipment is manufactured to very precise tolerances and fine clearances. It is therefore essential that absolute cleanliness is observed when working with these components. Always install blanking plugs to any open orifices or tubes.
CAUTION: When reusing liquid or vapor tube connectors, make sure to use compressed air to remove any foreign material from the connector retaining clip area before separating from the tube.
CAUTION: Make sure the quick release fitting clicks into place when installing the tube. To make sure that the quick release fitting is fully seated, pull on the tube.
NOTE: Apply clean engine oil to the end of the tube or fitting before connecting.
If this isn't the fitting you have let me know and we can try again.
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That looks like it may be the quick disconnects on my truck are color coded