Question about 2007 GMC Yukon Denali

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Last night my 2007 Yukon denali wouldn't start. When trying to enage the starter by turning the key, the lights would go out but starter wouldn't enage. When I released it the key the lights, radio would come back on. Battery is new and I could do all other functions such as opening & closing liftgate, open windows & sunroof. Tried turning the ignition about 30 times over a 15 min period then after resting for 5 min tried it again and it started. When the starter enaged it seems to be spinning at normal speeds. Car has done this serveral times over the years however usually its starts the second time you turn the key. Taken it to the dealer and was told because it was intermtten they couldn't locate problem. Car seems to be fine now. Any suggestions ?

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WOW, THIS COULD BE INTERESTING......from a dirty earth connection at the starter to a loose battery post......ignition switch fault to a relay terminal.For anyone/a dealer to "find"this "fault", they would have to have the car as soon as the fault appears.(in other words"you go to start it and nothing,then they start work....)you would need voltmeters/testers..jumper wires...and a lot of patience,(and luck)to find this fault for a reasonable cost........the last time i had a problem like this i swapped cars with my customer for a MONTH before the fault arose.yes we did sort it,starter motor pos pillar isolation compound cracked.....(was a nice ride for me though....)best of luck.Geoff.England.

Posted on Nov 06, 2010

  • geoff hunter Nov 09, 2010

    been thinking about this problem and i would change the ignition barrel.complete.

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