Rear, yes. Front, yes and no?
If you just need rears then there will be no problem, but it is the age of the vehicle that causes the fronts to sag, yes they will fit, but for the amount of labor, just put new ones on. After about 5 years on a TTB front end the springs will be junk. Air bags are the only way to fix this but you will need to make sure your front end is tight and then put it on an alignment machine and have the bags inflated until your camber is in spec. Do this with your truck unloaded.
If you just need rears then there will be no problem, but it is the age of the vehicle that causes the fronts to sag, yes they will fit, but for the amount of labor, just put new ones on. After about 5 years on a TTB front end the springs will be junk. Air bags are the only way to fix this but you will need to make sure your front end is tight and then put it on an alignment machine and have the bags inflated until your camber is in spec. Do this with your truck unloaded.