I have a 2018 Yukon XL Denali. It appears the rear shocks are worn out. I say that because there is an audible leak from the driver side rear shock that I can run my finger over and feel. I know the truck has mag ride. I assume the rears are mag ride also? I looked them up on GMPartsDirect.com and they are back ordered (item 86787494). Is there a comparable interchange? I prefer to stick with OEM, but am open to a quality aftermarket. I am happy with the stock ride. I tow a 7k lb car hauler with a jeep on it often enough. Truck is all original, do not plan to modify it. Thanks all.