I need to know where i can get a good tune up on a 99 grand prix supercharger with high mileage
Any good local mechanic can help. Fluids, filters, spark plugs, etc. Can also look at the suspension, brakes, etc as well
At some shop that's really expensive and seems to have really expensive cars sitting around outside-
If you're referring to just the supercharger, don't worry about it. They rarely fail and are engineered to be maintenance free. If the supercharger is making some sort of noise, its probably the coupler that connects it to the engine, Any mechanic can replace that, but if its not broke don't fix it.
Looking for a Used Grand Prix in your area?
CarGurus has 2,863 nationwide Grand Prix listings starting at $1,600.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts