Truck Service

Expert mechanicsWe are a full service shop specializing in all types of diesel truck repair from simple oil changes, brake service and diagnostics, to complete engine, transmission and differential removal and replacement.

We stock only the highest quality commercial batteries, with the highest cranking amps. All batteries are maintenance free for years of dependable service.

We also specialize in fleet maintenance, keeping your trucks on track for D.O.T. inspections. Mobile service is also available, in case of emergencies.

We have a large stock of inventory on hand and can supply you with the best quality parts for the “do it yourselfer”, at competitive prices. Next day deliveries on special orders are our specialty.

  • From Our Customers

    Dear Steve,
    We so appreciated you coming to Jackson Rancheria RV Park to site 27 to get our slide out to go back in on our trailer. We thank you for coming so quickly and finding the problem. With my husband being handicap it is not easy for us. If you are ever in Loomis, look us up.

    Nancy & Richard Beck
    Loomis, CA

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  • Contact Us

    Sierra Heavy Duty, Inc.
    18968 Waylon Way
    Sonora, CA 95370

    (209) 532-7994
    (209) 532-8229 (fax)

    Map & directions...