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Old 12-18-2013, 09:46 PM
dgregory dgregory is offline
LawnSite Member
 
Join Date: Nov 2011
Location: NC
Posts: 6
I have a c5500 4x4 with 8.1 and get 5mpg loaded or empty. My 3500 and 4500 both duramax get around 10 mpg. Lots of trouble with wiring on both 4500 and 5500.
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