To find the relevant component, you'll need to:
1. Consult your Buick Park Avenue's repair manual: This is the most reliable source. The manual will show diagrams and pinpoint the location of the relevant components related to the starter motor. You can often find a free PDF version online by searching for "[your year] Buick Park Avenue repair manual."
2. Check the fuse box diagrams: Look inside both the under-hood fuse box and the interior fuse panel. The diagrams often show the starter circuit components and the fuses or relays involved.
3. Check online forums: Search online forums specific to Buick Park Avenues (like those on car enthusiast sites) for information about your year and model. Someone else may have already dealt with a similar starter issue and described the location.
If you do find a relay that seems to be involved in the starter circuit, it's often located in the under-hood fuse box. But again, remember that it might not be a clearly labeled "starter relay".
Important Note: Working on automotive electrical systems can be dangerous. If you are not comfortable working with car electrical systems, it's best to take your vehicle to a qualified mechanic. Incorrectly handling electrical components can lead to damage or injury.