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  • MARK E

    WEST DES MOINES, IA | 2026 GMC Terrain
    Confirmed Sales Review
    May 19, 2026
    From the time I first expressed interest in my future vehicle until I drove it off the lot the staff at Karl GMC was absolutely amazing.

  • Reggie Z

    MARSHALLTOWN, IA | 2024 Chevrolet Tahoe
    Confirmed Service Review
    May 14, 2026
    Right on schedule very clean facility

    Response from Karl GMC of Marshalltown

    May 15, 2026
    We’re glad we could help keep your vehicle running at its best. Thank you for trusting our team!

  • Phillip L

    MARSHALLTOWN, IA | 2011 GMC Sierra
    Confirmed Service Review
    May 13, 2026
    Great Service!

    Response from Karl GMC of Marshalltown

    May 14, 2026
    We’re happy to hear your service visit went smoothly! Thank you for choosing our team — we’re always here to help.

  • Garry B

    ALBION, IA | 2017 GMC 1500 Sierra
    Confirmed Service Review
    May 5, 2026
    On time . Got-r-done oil change. Happy as a drunk skunk that just left the fermented garden patch of cabbage and cannot hold it flatulence. Smile at that one. Hehhehe

    Response from Karl GMC of Marshalltown

    May 6, 2026
    We appreciate you taking the time to share this! Our service team works hard to keep every experience smooth and efficient.

  • DAVE J

    COLO, IA | 2026 GMC Sierra 1500
    Confirmed Sales Review
    May 4, 2026
    Quick, friendly experience.

  • Kristine K

    MARSHALLTOWN, IA | 2023 Buick Envision
    Confirmed Service Review
    April 30, 2026
    Good service answered all my questions very helpful

    Response from Karl GMC of Marshalltown

    May 1, 2026
    Thank you for trusting our service team with your vehicle! We’re glad we could make your visit a positive one.

  • Kevin L

    STATE CENTER, IA | 2024 GMC Sierra 1500
    Confirmed Service Review
    April 30, 2026
    Very please with my experience.

    Response from Karl GMC of Marshalltown

    May 1, 2026
    Thank you for the positive feedback! We’re committed to providing quick, reliable service, and we’re glad we delivered for you.

  • YOHANKA N

    PELLA, IA | 2026 GMC Terrain
    Confirmed Sales Review
    April 25, 2026
    Súper fácil con todo y un trato Excelente

  • Bradley C

    MARSHALLTOWN, IA | 2024 GMC Sierra 1500
    Confirmed Service Review
    April 24, 2026
    Brad and his team took care of all of the issues with care. Great experience.

    Response from Karl GMC of Marshalltown

    April 24, 2026
    Thank you for the positive feedback! We’re committed to providing quick, reliable service, and we’re glad we delivered for you.

  • Thaddeus J

    CONRAD, IA | 2022 Chevrolet Equinox
    Confirmed Service Review
    April 23, 2026
    It was an oil change what else do you want me to say?

    Response from Karl GMC of Marshalltown

    April 24, 2026
    We appreciate your business — thank you!