My 2018 silverado transmission just went out. Just got the call. 99,000 miles on it. Was wondering, instead of dropping 8k on putting a new one in, if I can just have them change fluid, filter, ect. They say its squealing and shifting rough. Yes ive heard squealing twice but I took it there for sputtering and hesitating. Any advice? I just want to take it to a dealer to trade it in. Straight to dealer