So I can drive 10 miles at 65mph and my degas bottle will be empty no coolant im sight except for dripping under my passenger side fender. We took it off and theres no hole or cracks on it. So can someone tell me whats wrong

 

we told you before to check head gaskets.

it's hard to believe that it'd be burning that much coolant and not smoking a massive amount of white, but a dye kit is about 30 bucks.

put it into the coolant, run the truck, draw some coolant out into the tester.
if it turns colour, you're leaking compression into the coolant. head gasket failure.

I still personally think you've got a leak somewhere. try turning on the heat. do you get a sweet smell in the cab of the truck? does the heater mist the windows badly? if so, heater core is gone and leaking.

check all the hoses, check the T stat housing...it's going somewhere.

 

Like from under the passenger fender?

It's leaking, find it.

 

stupid as it sounds, that was said to him.

OP:
if you pulled off the reservoir and it was good, did you check the hoses that run to it?