After looking up labor and parts, it looks like this could be an expensive job.
Timing belt labor is 3.5 hours
belt = $95.00
Tensioner = $261.00
I would ask why you need the tensioner and if this is often replaced. Unless it is damaged I can't imagine that it gets replaced as part of the service. Call around and see if this is normal for a Saturn.
Spark plugs 2.7 hours labor for all 6
Depending on the amount they charge for labor, you may be talking around $1000.00 or more for this job. Hope this helps.
〉 Answered on Mar 18th, 2008 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines