2020 GMC SIERRA DENALI Complaints

View complaints related to 2020 GMC SIERRA DENALI. The complaints found here are submitted by actual consumers with first hand experience. There are more than 20 complaints submitted for the 2020 GMC SIERRA DENALI. You can submit your own complaint to the NHTSA or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153.

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  • 2020 GMC SIERRA DENALI
    - KENTFIELD, CA

    I NOTICED SEVERAL SPOTS OF OIL ON MY DRIVEWAY, I THEN INSPECTED THE UNDERSIDE OF THE ENGINE (L5P) AND NOTICED OIL DRIPPING FROM SEVERAL BOLTS AND LINES. MY VEHICLE, A 2020 2500HD DENALI DIESEL, HAS ONLY 2,200 MILES ON IT FROM NORMAL HIGHWAY DRIVING.

    Source: NHTSA WEB SITE