GMC Logo2011 GMC Sierra 3500HD III (GMT900, facelift 2011) Regular Cab Long Box: Engine bay layout with visible components and cover in a heavy-duty pickup.

Engine bay layout with visible components and cover in a heavy-duty pickup.

Top-down view of a heavy-duty pickup engine bay showing the central engine cover, battery compartment, fluid reservoirs, and various connected components under the hood.

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

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