Have had fluid change for shutter at 30000 under warranty. At 69000 had to do the fluid change again. 839 bucks at gmc dealer. Wow. Does that sound correct??? Also will it need to be done in annother 40000 or less?? What can i do to extend the time. What am i doing wrong? Averaged about 7500 for 7 years. Maybe i dont drive enough. Maybe i should take longer trips?? Also had my longtime trusted mechanic put shocks on back and struts on from. $4000. They were leaking oil or out if oil. Seems like you should not have to putshocks, struts, and second fluid change to temporarily fix shutter problem at 69000. 2015 yukon Denali. $4800. I am 72. Seens like alot to me. When I was 16 I would buy a pack of smokes for 35 cents and gas was 35 cents a gallon. So seems like alot.??