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Old 10-14-2010, 02:39 PM   #2
Dan@showstopper
 
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Drives: 2010 Camaro SS
Join Date: Feb 2010
Location: Illinois
Posts: 499
The new avalanche gets 21 with the 5.3 so it's right on par. For me 2 mpg isn't worth the power loss of a V6. The eco-bosst I would imagine might be right between them at 22.
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