2011 GMC Sierra C15 Xfe

Truck Flex Fuel
GMC Sierra C15 Xfe 2011
18MPG Combined
1 Trim
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Updated February 27, 2026

Get the full picture on the 2011 GMC Sierra C15 Xfe. As a Truck, it achieves 18 combined MPG and has not yet been rated by NHTSA. Below you’ll find detailed specs for every trim, plus recall information and competitor comparisons.

2011 GMC Sierra C15 Xfe Specifications

SpecValue
Combined MPG18 combined MPG
City MPG15
Highway MPG22
Body StyleTruck
Fuel TypeFlex Fuel
DriveRWD
Available Trims1

Annual Fuel Cost

Based on EPA estimates, the 2011 GMC Sierra C15 Xfe costs approximately $2,450 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.

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