Every once in a while, every car needs to pass a smog test. One place will offer to do it in 15 minutes, and provide excellent customer service too. G&S Smog & Repair in Shingle Springs receives a high volume of customers, but keeps them satisfied with two dynos to make service fast and efficient. Quality is just as important during the inspection and servicing of your automobiles, though, and the place offering it also offers tune-up services, is ASE certified, doesn’t require appointments and is a smog diagnostic specialist. G&S Smog is open Monday through Friday, 7:30 a.m. to 5 p.m., and Saturday 7 a.m. to noon.