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2005
Diesel
2005 GMC Sierra 2500HD trims

2005 Sierra 2500HD

MPG City
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MPG Hwy
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Fitted with a 335 hp 6.0L V8 as its base engine, the 2005 GMC Sierra 2500HD is a full-size heavy-duty pickup truck built for towing and other tough applications.

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2005 GMC Sierra 3500 trims

2005 Sierra 3500

MPG City
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MPG Hwy
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The 2005 GMC Sierra 3500 is a full-size pickup truck available with single or dual rear wheels which make it the toughest truck in the GMC lineup, capable of towing great loads.

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The GMC Sierra and the Chevrolet Silverado become the first hybrid pickup trucks to enter production for the 2005 model year. The Sierra 1500 Hybrid pickup truck is propelled by a 5.3-liter V-8 engine but incorporates regenerative disc braking for stop/start technology and auxiliary power. For the 2005 model year, a luxury-oriented Denali version of the 2005 Envoy and Envoy XL brings the trademark chrome mesh grille and high-end interior features to the mid-sized sport utility vehicle. The 5.3-liter V-8 on the Envoy Denali also introduces Displacement on Demand technology. In other Denali news for 2005, the Sierra version of the luxury-appointed GMC is promoted to the crew cab body style.