ognend
Virginia
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Joined: 06/25/2011
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Hello all.
I am 7,000 miles into owning a brand new '21 Chevy crew cab, cab chassis 4x4 DRW gas truck that came with dual fuel tanks (40 + 23.5 gal).
In the whole ownership of the truck, I have successfully filled it up full maybe 1/3 of the time.
It is my understanding that you are not supposed to use the front tank for fill-ups, correct? I tried a few times and it spat fuel back immediately so I concluded that the back tank is to be used. The way I understand it is that fuel flows from back tank to front tank, yes?
When I use the back tank, I have to open the front tank first to "depressurize" (get air out of) the whole system - this I found out on my own - without that the back tank spits fuel out as well. Is this correct?
After I do this, I am able to fuel up but often I can only get to between 3/4 and full on the gauge. After that, it spits fuel back from the back tank as well.
What gives? Is my fuel system faulty or is this normal? Are they this finicky? Thanks!
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2021 Chevrolet 3500 DRW Cab&Chassis crew cab 4x4 6.6L gas with 9ft4" flatbed
2013 Palomino HS-2910 Max truck camper
2007 Double D all steel 2-horse bumper pull trailer
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opnspaces
San Diego Ca
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Joined: 12/22/2004
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That sounds faulty to me. I would suggest taking it to the dealer to investigate. On the surface it sounds like the tanks area not venting properly during fill.
2001 Suburban 4x4. 6.0L, 4.10 3/4 ton
2005 Jayco Jay Flight 27BH
1986 Coleman Columbia Popup.
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Krusty
Calgary, Alberta,Canada
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Joined: 04/26/2003
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Definitely doesn't sound right. Sounds like the tanks are not venting. Get it checked out.
Krusty
92 F-250 4x4 460 5spd 4.10LS Prodigy
97 Rustler RT190
EU2000i
Garmin
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ognend
Virginia
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Joined: 06/25/2011
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opnspaces wrote:That sounds faulty to me. I would suggest taking it to the dealer to investigate. On the surface it sounds like the tanks area not venting properly during fill.
Thanks!
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ognend
Virginia
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Krusty wrote:Definitely doesn't sound right. Sounds like the tanks are not venting. Get it checked out.
Thank you!
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valhalla360
No paticular place.
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Joined: 08/19/2009
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Why would they put a fuel fill on the front tank if you weren't supposed to use it?
As others have said, sounds wrong.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
Gemini Catamaran 34'
Full Time spliting time between boat and RV
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ognend
Virginia
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Joined: 06/25/2011
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valhalla360 wrote:Why would they put a fuel fill on the front tank if you weren't supposed to use it?
As others have said, sounds wrong.
I understand and I agree about the "why".
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eHoefler
ozark mountains
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Joined: 10/22/2011
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The fill necks are too low. The after market bed manufacture has them too low.
2021 Ram Limited, 3500, Crew Cab, 1075FTPD of Torque!, Max Tow, Long bed, 4 x 4, Dually,
2006 40' Landmark Mt. Rushmore
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ognend
Virginia
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eHoefler wrote:The fill necks are too low. The after market bed manufacture has them too low.
Assuming this is correct - what is the fix? Thanks!
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PA12DRVR
Back in God's Country
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Joined: 09/17/2003
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ognend wrote:eHoefler wrote:The fill necks are too low. The after market bed manufacture has them too low.
Assuming this is correct - what is the fix? Thanks!
Had a sort-of-kinda-like problem on my recently sold dump truck. First thing to look for is whether the fuel fill spot ("fuel cap") is higher than the tank(s). Second, if the "fuel cap" is indeed higher than the tank(s), does the fill pipe run between the cap and the tank in such a way as to allow fuel to gravity flow down or is there either an extended run of level fill pipe or does the fill pipe even run "uphill" from the fuel cap before dropping down into the tank.
On my truck, it was the latter situation: there was a slight, very slight, uphill run between the cap and the first bracket on the hose. For whatever reason, it would fill fine until the tank was 3/4 full, then I couldn't get any more fuel in the tank...it would just come back out. I lengthened the bracket, had a local shop shorten and straighten the fill pipe (so it ran entirely downhill between the cap and tank) and the problem was resolved.
Another option of course is to put the fuel cap at a higher location on the bed, but that's probably difficult with the aftermarket bed.
CRL
My RV is a 1946 PA-12
Back in the GWN
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