Question about 2002 GMC Yukon Denali

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Girlfriend's 2002 Yukon will crank but then occasionally RPM's will drop and it will almost die. Replaced O2 sensors but ... still occurring?

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  • Ray Keckeisen May 11, 2010

    checkfor a cracked or broken vacuum line, put a vacuum gauge on it and let me know what the readings are,get back to me Ray

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  • 6 Answers

Look at the mass air sensor next to the air filter, check to make sure the clamps are tightend and it is properly sealed. Quick oil change places ar famous for not putting it all back together properly after checking the air cleaner.

Posted on Mar 09, 2010

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