2010 GMC YUKON open gas tank

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Page 441 of 614

GMC YUKON 2010  Owners Manual Some gasolines that are not reformulated for low
emissions can contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline

Page 445 of 614

GMC YUKON 2010  Owners Manual When replacing the fuel cap, insert the tether in its hole
before tightening the cap. Turn the fuel cap clockwise
until it clicks. It will require more effort to turn the fuel
cap on the last turn as