In Concord CA, along Detroit Ave is an auto maintenance and repair shop that has been performing quality work from brake work, to heating and cooling services all under one roof.  And that is just a small portion of their services at Concord Auto Service.  Customers can find free local shuttles to and from work or home if needed, as well as free inspections, just call ahead.   But what puts Concord Auto Service on the map are their Tech-Net  certified specialists who are trained to perform maintenance on all…