You'll find that most GP repairs have guides for them. If not on this forum, then Club Grand Prix! Your online Grand Prix & G8 resource.
Also, as a forethought, if you get a Grand Prix (97-03), make sure you scroll through the quality issues guides and eliminate any future problems. For instance, the annoying little gutter of a drain that sits over your cabin intake. Trust me, you don't want water in your floorboards.