I have a 2007 suburban 1500 2wd. Will suburban 2500 rear suspension parts fit on my suv or should I just go with new 1500 parts? I wanna help cure some of the rear end sag when hauling my camper.

 

If you do not have the auto leveling suspension (factory air shocks) I would put a set of air shocks in it so you can ''air them up'' when towing to reduce sag and be able to let the air out when not towing for a smooth ride.
My Tahoe has the auto level system, and it works great when I'm loaded up and hooked up.
2500 parts are not compatible with the 1500.

 

Any recommendations on a quality kit to purchase?

 

You refer to a camper, I think you must mean a trailer. Check your owners manual to see how much tongue weight you are permitted without using a load equalizing hitch. Consider purchasing a load equalizing hitch.