I'd say since it's under warranty make the dealership do their job. There's no sense in you stressing out when they are responsible for the fix. Where are you in Kansas? Maybe there is another dealership around that will treat you better. If the same problem keeps coming up there are lemon laws to protect you. I'm sure you'll get it fixed though.
Good luck
Brett
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66 Tahoe Turquoise Coupe
Laser Red 96GT Ragtop
30 Years & 30 inches apart in the driveway!