2009 GMC Yukon Denali will not start properly, cranks but doesn't start.
I have a 2009 GMC Yukon Denali and same thing. I replaced the fuel pump in
December of 2017 and went to O'Reilly's to check the battery, alternator, and
starter to see if those were any of the problems and they said all 3 were in great
shape. My truck will start with someone else helping to give it a jump but i don't
know what it could be possibly.