Yes, you can.
Add the code to the functions.php inside your active theme folder.
You do have to replace the 1 with the ID of the category you want to set as selected. You can find the category IDs on the Store Locator -> Store Categories page. Open the one you want to set as selected, and look for the number after tag_ID in the url bar.
It didn’t work.
I placed it in the active theme folder.
We are trying to get Parts & Service to come up instead of Service center
http://www.cpointweb.com/clients/fleet/
I assumed you where using the dropdown and not the checkboxes. It only works for the dropdowns. It’s unfortunately not possible with checkboxes at the moment to make a default selection.
Excellent. That did it. Thank you.