you for reaching out to the Community regarding your issue, although I am sorry
to hear that you are experiencing issues adding your pep boys account. It looks like it doesn't have a direct connection available so I'm wondering if we might need to try a workaround to try getting it working. Instead of searching Pep Boys try to see if you can sign in using "Guitar Center Credit Card". While it looks odd other users have had success connecting their cards to Quicken using this connection since it is also a synchrony sign in. It should be the same username and password as your Pep Boys card.
you get a chance to try these steps, please let us know if you're able to connect. If not we'll see what our next option is.