how often should a tuneup take place?

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! "Tune-up is a bit of an outdated term. What you're most likely referring to is a maintenance check. That's an overall check of the vehicle that will give you an idea of its health. Toyota usually does checks every 15k. I'd stick to that schedule. You'll be able to keep that GS350 on the road indefinitely! If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.