2011 GMC Sierra 3500HD III (GMT900, facelift 2011) Regular Cab Long Box: Bold front grille and dual headlights with amber indicators.

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Close-up of a truck's front featuring a bold rectangular grille with horizontal slats and a prominent badge center, flanked by dual rectangular headlights with amber indicators and a chrome-accented bumper.

View Dimensions of the 2011 GMC Sierra 3500HD III (GMT900, facelift 2011) Regular Cab Long Box

View 18 images of the 2011 GMC Sierra 3500HD III (GMT900, facelift 2011) Regular Cab Long Box