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    2004 GMC Yukon flex fuel edition issues

    Yes start the engine and it starts oddly it's not the starter lol its definitely engine trouble
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    2004 GMC Yukon flex fuel edition issues

    The fuel mileage is definitely way better I am pleased about that but the start up when hot is kinda odd didn't have this before it clunks it cranks maybe 2x then clunk then it's running perfectly. Shut it off wait a minute then it starts normally if I leave it for 10 minutes or more it does it...
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    2004 GMC Yukon flex fuel edition issues

    Oh yes I did change them even though I was in there in 2019 and changed them then better safe than sorry! I will post about it every other day or so it did have a lil hiccup when warm it started weird? Kinda like a clunk
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    2004 GMC Yukon flex fuel edition issues

    https://photos.app.goo.gl/geJmEPc5rMndSUkY8
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    2004 GMC Yukon flex fuel edition issues

    https://photos.app.goo.gl/L9tU9Y5zo2rXXGb17
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    2004 GMC Yukon flex fuel edition issues

    It looks gross in the picture I cleaned it afterwards..
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    2004 GMC Yukon flex fuel edition issues

    I sure did shoot 1 pic and a video I wish this thing let me upload videos. Anyway I am getting 80 miles per quarter of a tank now so yes it's fixed I got 180 miles and I'm above half a tank
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    2004 GMC Yukon flex fuel edition issues

    I replaced all the gaskets on it tonight every single one but the head gaskets. I have to put the fuel rail back on it and button up some stuff then I am done hopefully that fixes the issues both banks were showing 20 to 25 on short and my long trims were acting funky as well so fingers crossed...
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    2004 GMC Yukon flex fuel edition issues

    https://photos.app.goo.gl/Hr8gY2v9h2jrGewf6
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    2004 GMC Yukon flex fuel edition issues

    It's a scanner not an app
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    2004 GMC Yukon flex fuel edition issues

    They are OEM ac Delco parts btw
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    2004 GMC Yukon flex fuel edition issues

    Who do I send an email to of my video of my scanner results?
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    2004 GMC Yukon flex fuel edition issues

    No odd plug color they were fairly clean other than the plug end it was pretty warn that's normal nothing out of the ordinary it sits below 210 pretty normal for a 5.3 I haven't done any modification to this at all other than getting an e fan professionally installed
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    2004 GMC Yukon flex fuel edition issues

    Yes 150 miles then I'm on E.. sucks huh?
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    2004 GMC Yukon flex fuel edition issues

    I drive freeway miles mostly not really in town it's a freeway rig for me I don't take short trips as for warming up the thing before taking off sometimes I let it a lil bit but not even for 2 minutes then I take off and go on my way. I will try to get the fuel trims posted soon! Thanks
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    2004 GMC Yukon flex fuel edition issues

    Always hwy driven at 65 mph or 70mph not many in town short trips never left idling I can get my short trim and long trim I'm Thanks, well I am running regular fuel in my yukon 87 octane Arco blend and I've also tried shell gas and others nothing seems too improve my fuel mileage I have no...
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    2004 GMC Yukon flex fuel edition issues

    Hello I have a 2004 GMC Yukon flex fuel edition I never use the stuff!!.. I am having issues with fuel consumption I don't get what's expected out of this truck it's got 179k miles on it no check engine light, the damn thing eats fuel 150 ish miles then I'm empty.. I've replaced 02 sensors map...

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