The Tune In & Tune Up program is open to all San Joaquin Valley residents. We cover all of San Joaquin, Stanislaus, Merced, Madera, Tulare, Fresno, and Kings Counties, as well as the valley portion of Kern County. If you live in one of those counties, you can attend any one of our events to see if your car needs emissions related repairs and potentially receive a $500 voucher to get it fixed.