Cobra
Full Access Member
Dang I need to find it because I have never replaced mine. Guy at Autozone told me I didn't have one. Said it was built in to the fuel sending unit.
Hey Guys, I need some help with my K&N
- Thread starter 2004YukonXLDenali
- Start date
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I doubt yours would be different since mine is a Z71, but it is possible.
OmarR
Full Access Member
Cobra, are you flex fuel? If so, you don't have a serviceable one. It's in the tank.
2004YukonXLDenali
Banned
Could one of you explain exactly where to look because I have been looking everywhere underneath that *****. Is it tucked up inside the frame because I followed the fuel lines and they run right next to and above the fuel tank then branched off into a unit with like four or five outlet stainless steel tubing. I would appriciate any guidance becase mine has never been changed either? Please help. Do I need to take anything off from the Yukon to get to it?
OmarR
Full Access Member
04+ flex fuel - it's in the tank and you don't service it.
05+ - in the tank, flex and non flex
If your 04 is non-flex, it will be at the fuel line underneath the driver's door.
05+ - in the tank, flex and non flex
If your 04 is non-flex, it will be at the fuel line underneath the driver's door.
Cobra
Full Access Member
Omar I don't know if my Tahoe is Flex fuel. But like the other guy said I followed the lines to a box, which I assumed was the fuel sending unit.. One guy at autozone said I didn't have another said I did. 
I guess I need to find out if I'm Flex.
Sorry Jonathan not intending to jack your thread.
I guess I need to find out if I'm Flex.Sorry Jonathan not intending to jack your thread.
Last edited:
2004YukonXLDenali
Banned
Bo Prob man, mines not flex fuel either and I cant find that damn fuel filter. Spend 15 bones on the ***** and I only have one place to stick and I am not looking forward to doing that.
My 04 is a Flex Fuel and it is right around the transmission crossmember.
---------- Post added at 08:13 PM ---------- Previous post was at 07:58 PM ----------
Just checked some tuning files:
04+ non flex is in the tank
05+ flex is in the tank
---------- Post added at 08:13 PM ---------- Previous post was at 07:58 PM ----------
Just checked some tuning files:
04+ non flex is in the tank
05+ flex is in the tank
OmarR
Full Access Member
Good update.
With 2004 being the changing year, I wouldn't be surpised if you found a little of both flex/non-flex with either in-tank or serviceable in the early builds.
With 2004 being the changing year, I wouldn't be surpised if you found a little of both flex/non-flex with either in-tank or serviceable in the early builds.
All 04 flex fuels have a return fuel system, with the fuel filter inline before the regulator. The intank systems have the regulator in the tank after the fuel filter.
Since the programming is different, there won't be any trucks with mismatched leftover parts.
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