When you need to make repairs to your vehicle, turn to Main Auto & Truck Parts. You'll get the lowest prices for the highest quality used auto parts in the area.  Used Auto Parts | San Antonio, TX | Main Auto & Truck Parts | 210-932-1100 Get the parts you need for your car when you need them If you need replacement parts for your vehicle, all you need to remember is Main Auto & Truck Parts. You'll get the lowest prices 6 days a week.Main Auto & Truck Parts supplies automotive truck parts. It offers new and rebuilt heavy-duty gear units, as well as new and used OEM parts.The company also provides parts for transmissions and differentials, as well as provides new, rebuilt, and used transmissions, differentials, transfer cases, axle housings, and other driveline components. In addition, it specializes in no longer available, obsolete, and no longer produced parts; and axle assemblies, axles, and service parts.