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Good stuff.

Thanks BlindSquirrel

I think you are right.
Thanks for your input.

Damn good call 5FDP. I do have a drivers side rear manifold bolt broke.
I would have assumed that this would have only affected that bank and not both sides so I ruled that out.

Is there some...

Hey Guys,

I am running out of ideas and would appreciate any insight you may have.

I have a 2011 GMC Sierra 5.3L and it has the occasional Ethanol Fuel % number that goes crazy high (59% this...