Fuel Economy

Engines EPA Estimated
Fuel Economy
(city/hwy)		 Fuel Tank Capacity
(gallons)
Short
Box		 Standard
Box		 Long
Box
2WD Models with 6-speed automatic transmission Vortec 6.0L V8 Not Available Not Available 26 34
4WD Models with 6-speed automatic transmission Vortec 6.0L V8 Not Available Not Available 26 34
2WD Models with 6-speed automatic transmission DURAMAX 6.6L Turbo Diesel V8 Not Available Not Available 26 34
4WD Models with 6-speed automatic transmission DURAMAX 6.6L Turbo Diesel V8 Not Available Not Available 26 34

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* The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all GMC vehicles' destination freight charges.
** Based on EPA estimates.