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2008 Cadillac Escalade EXT Question: What could my problem be?

 

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Nlg_15, Dumas, TX, January 04, 2014, 14:01
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I get the both the codes p0171 and p0174 on my 2008 escalade, but they only stay on for a day or two then come of and reappear in about a day. My truck only has 77k mi. I have had the code p0449 but I have replaced my solenoid purge valve and that light has turned off.

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  • Answer #1

    pushrod January 04, 2014, 14:16
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     Master

    Most likely suspect is vacuum leak(s). The LS engines have had some intake gasket problems, not sure about the 2008 - 6.2L though.

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