2009 GMC Sierra Hybrid 2WD Truck
- 8 cyl, 6L, automatic (variable gear ratios):
- 21 city | 22 highway
2009 GMC Sierra Hybrid 4WD Truck
- 8 cyl, 6L, automatic (variable gear ratios):
- 20 city | 20 highway
By Dale Wickell, About.com
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