is my dealership overcharging me? on 2007 Pontiac G6

my dealership who i got my car from just 6 months ago is saying the shifter cable needs replaced and shifter assembly. apparently its not covered under my warranty and they want to charge me $567.56. i dont want to be taken advantage of. i dont know much about cars.

Asked by for the 2007 Pontiac G6
Can always get another opinion, aamco will test it free of charge.
1 more answer
Hi; I'm in Stephenville and it would cost you around $250.00 here. Would like to get $500 for it, but it doesn't work that way here. Good Luck