How do you replace the tensioner and serpentine belt on a 1996 Saturn SL2?
The serpentine belt you can look at the diagram in your engine compartment for actual routing.
The tensioner mounts to the left side of the engine. You need to unbolt the whole assembly.
Actually, the belt can be loosened by tightening the bolt of the tensioner pulley. When fully tightened, the pulley will act as a swivel.