Will they fit? Sure. Too narrow of a wheel IMHO and the centers will wear as will the ride and safety factors be compromised. You won't have full contact across the section of the fire at full psi, you won't have full braking or turning potential either. Is your truck lifted? Don't know many if any GM guys can fit a 33" tall tire without at least a few cranks on the torsion bars to level it out.
I'm with the guy above, purchase new wheels or find factory 7" wide wheels to work if you plan on a new truck soon.
