Question about 1999 GMC Yukon

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What kind of gas should i use because my manual was not in the car when I bought it?

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Your Yukon should perform well on 87 octane ie regular unleaded. If you need an owners manual try Ebay a local salvage yard. Or you can purchase a new owners manual at books4cars.com

Posted on Jul 22, 2009

  • Patrick Razvoza Jul 23, 2009

    Baboono FYI BMW & Mercedes Use Premium or 93 octane not the 89 or mid grade you suggested

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Dear friend-you must use unleaded as that is what you vehicle is desight for

Posted on Jul 22, 2009

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90% of vehicles manufactured today use 87 octane unleaded fuel, only some German vehicles (BMW, Mercedes) recommend a minimum octane rating of 89.

Posted on Jul 22, 2009

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