Question about 1999 GMC Yukon Denali

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Service engine light staying on

99 GMC Yukon Denali - service engine soon light came on today, ot's about due for a 3,000 mile oil change, could that be the reason? just purchased vehicle last Wednesday, please help me

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  • Keith Heavilin
    Keith Heavilin May 11, 2010

    The engine light shouldn't be turing on because the oil needs to be changed.  Take the vehicle to your local auto parts store and they can read the code for the error.  Bring that back here and we can help you out.

  • Anonymous Mar 28, 2014

    oil light came on at 26k miles and now stays on and oil change not due till 31k

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  • 1,623 Answers

Hello tdamm...No...the service engine soon (SES) light on your yukon is not telling you to change the oil.
This is a warning light that is illuminated when there is a problem affecting the Emission system and the engines computer management (ECM) has detected it from a fault. It could be something as simple as a loose or defective gas cap. If the SES light is blinking, it's more serious....
The yukon needs to be connected to diagnostic equipment (scanner) for fault diagnosis.
You can go to autozone they will hook up an OBD II scanner to your vehicle and explain the codes to you.
Good luck...i hope this helps and will fixya up.

Posted on May 25, 2009

  • scoobysna728 Jan 01, 2011

    hi,

    i also own a 99' Yukon Denali and i do have the same prob. like this guy above... in my case the SES is NOT blinking!! (puuh) gonna have it pluged up to see whats wrong...

    thanks.. will post again do let you guys know what it was!!

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