Rear spring shock is broken on my pontiac montana van, year make 2002,is it easy to fix or how much will it cost,thank`s

I usually charge a base price on shocks and struts.to change shocks I charge around 30.00 or 40.00 dollars labor per pair.struts i charge 65.00 per pair.i'm cheeper than most guys because of the rural small town i live in here in alabama.but it may be your leaf spring not real sure by the discription,you could mean the shock,or the strut but it could mean the leaf spring which i think montanas have a shock and leaf spring set up not struts.i can't pull up my picture in my head too clearly,i've seen underneath hundreds of those vans just can't remember.hope i helped you with a price,don't let any body rip you off on the labor cause shocks are fairly easy to change.