I'm 3 hrs. West of Sacramento, and can't help you with a shop referral(unless you want to tow it to Santa Rosa), but if you let us know the symptoms of your issue/breakdown, there's a good chance you may get an accurate diagnosis right here.

North of San Francisco Bay Area
Hammond Autowerks / MB & Crossfire Specialists
Santa Rosa, CA (Sonoma County, 2hrs. North of S.F.)
(707) 538-4325