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The engine itself is Flex-able. You need to check the fueling system, usually injectors and pump, plus a few other pieces, then adjust the tune for Flex-ability.is there anyway to mod a 4.8L to Flex Fuel E85?
a full conversion sleeper and still pass California Smog testing?
I found a Nice 2007 tahoe LS 4.8liter for $6,000 with 139k miles on it.
E85 is dirt cheap here