My fuel tank is NOT 26 gallons
- Thread starter duratothemax
- Start date
I put 34.5 gallons last week. I've never run out of gas yet. I can run aboot 80 miles after the low fuel light comes on. I do this on a regular basis so I know how much fuel I have, bur like I said I've never run out of fuel so I really don't know how far I can go
Ben with my 02 the first 2 years I had it I could go safely 25 miles after fuel light and put in anywhere from 22-24 gallons (put in as much as 25 once) and then randomly one day I ran out and light hadnt even come on, happened two more times after that and from then on i would just fill at 1/4 tanks.
this 04 lly the light seems reliable... i only end up putting in 22 or so with the light on.
this 04 lly the light seems reliable... i only end up putting in 22 or so with the light on.
I have a 26 gallon tank and I always fill it when it gets to 1/4 tank. it usually takes 19-20 gallons to fill.
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I pulled the factory vent out of my LB7 and put in my own vent system similar to the newer trucks. I have put 28+ gal in it a few times and it was still running. I also run a draw straw in the tank and return into the factory bowl. I need to do it on my 04 because it does not hold nearly as much fuel.
Ben my truck has done the same thing to me twice and I have no idea why. I have never been able to put more than 23 gallons into it. I have a digital fuel gauge that seems to be pretty accurate and my low fuel light comes on typically around 7-8% fuel remaining. I cant explain the two random times where my truck gave up quietly with no low fuel light.
When the low fuel light came on in my 2003 I was pretty much screwed, as I had 5 miles or less. I ran it out of fuel twice, both times coincidentally and luckily pulling into a gas station. I don't recall how how many gallons topped it off, however.
I do know that when the light in my 2007 comes on, it will only take 19-20 gallons to fill it.
Interesting.
I do know that when the light in my 2007 comes on, it will only take 19-20 gallons to fill it.
Interesting.
On my 06 cc, lb, dually it has a 34 gal tank, when I first got it new, the low fuel light would come on and it would hold 29-30 gal, now 6 years old the low fuel light comes on and it will hold 26-27 gal. At 1/4 tank it will hold 20 gal. I know it isn't accurate, but it bothers me to only see 400 miles between fillups after the first tank I got 635 miles out of.
That stuff is weird forsure. There is two different problems in this thread, we kinda got side tracked. duratothemax seems like he has some type blockage in his tank causing less usable volume (probably concrete lol), or a shortened pickup. Everyone else's gauges are just reading wrong.
X2 There are no compartments or real baffling in these fuel tanks, and yes GM fuel pick-ups and sending units suck ballz! He has to have a pick up issue in the tank, dont think they made smaller tanks and some got put on these trucks....sorry your having this persistent issue.
alright good so its not just me.
Maybe ill put one of those sumps on my tank. Its gonna be hard to cut into the bottom of my tank though. And im paranoid Ill hit the sump on something and knock/break it off...
Maybe ill put one of those sumps on my tank. Its gonna be hard to cut into the bottom of my tank though. And im paranoid Ill hit the sump on something and knock/break it off...
Before you put a sump in the tank, drop the tank and rebuild the pickup assembly. There are no tank baffles but the pickup has its own bowl assembly with a one way valve in it.
I would be prepared to rebuild the pickup as it sounds like you have a cracked pickup tube. The tube is a plastic corriguated tube and could crack easily in one of the corriguations. Replace the tube with fuel rated hose and a small loop as the pickup basket is spring loaded and actually presses against the bottom of the tank to allow for flex in the bottom of the tank.
I have a lift pump with no issues. Have put over 24 gallons in the tank before and never ran out of fuel or lost supply pressure. Supply pressure has dropped slightly, but was still there under WOT and over 10 psi.
Try the PPE pickup instructions. That is where this picture came from. You can see the pickup and return tubes.
I would be prepared to rebuild the pickup as it sounds like you have a cracked pickup tube. The tube is a plastic corriguated tube and could crack easily in one of the corriguations. Replace the tube with fuel rated hose and a small loop as the pickup basket is spring loaded and actually presses against the bottom of the tank to allow for flex in the bottom of the tank.
I have a lift pump with no issues. Have put over 24 gallons in the tank before and never ran out of fuel or lost supply pressure. Supply pressure has dropped slightly, but was still there under WOT and over 10 psi.
Try the PPE pickup instructions. That is where this picture came from. You can see the pickup and return tubes.
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Ahhh you know what...I think you might be onto something. That is a very good idea and definitely sounds plausible as to what is happening...makes sense, a small crack in the pickup tube above the bottom of the tank...because when I run out of fuel, its always when im going up a long hill (so therefore, if the pickup tube was cracked, all of the fuel sloshing to the rear of the tank would expose the higher-up cracked portion to air before it exposed the bottom of the actual pickup to air)
I've had the same problem as you Ben since I got my truck, at most it would take 22 gallons. I sumped the tank last year and the one thing I noticed was I can drive with the light on a lot longer than i could before. Can't remember the mileage off my head tho. When I did the sump I ran it what I thought was damn near out of fuel before I dropped the tank and it still had ~5 gallons in it when I drained it. I also checked the stock setup and there was no issues with it at all, other than it sits up IMO too high from the bottom of the tank. I haven't ran it out of fuel so im not sure what it will take too fill it from e, I may have to go try it.
I put 24.2 gallons in my truck this morning. I've been getting around 500 miles per tank on the interstate (cruise set at 70-72 mph)
I've been noticing that my low fuel light has been slacking lately as well. I have ran out of fuel 3 times in my truck. The first time the low fuel light came on before I ran out and the other 2 I ran out then it came on. Im going to be dropping the tank here in a few weeks and plan on experimenting with its actual capacity.
I've been noticing that my low fuel light has been slacking lately as well. I have ran out of fuel 3 times in my truck. The first time the low fuel light came on before I ran out and the other 2 I ran out then it came on. Im going to be dropping the tank here in a few weeks and plan on experimenting with its actual capacity.
It's kinda like when the funny guy at the shop cuts a slit in your straw from lunch. :spit:
Both my 06 and 07 can go at least 80 miles after the low fuel light comes on, I haven't dared going further though. At 80 miles after the light comes on The most fuel I've put in was 24.5 gallons.
06 has 107k miles
07 has 23k miles
Both my 06 and 07 can go at least 80 miles after the low fuel light comes on, I haven't dared going further though. At 80 miles after the light comes on The most fuel I've put in was 24.5 gallons.
06 has 107k miles
07 has 23k miles
When my light comes on, i have 5 gal left (least what i think). been that way since new in 01. if i fill up right as the light comes on, its 29.5 gal. Most ive ever put in is 34.5 gal and i thought i was gunna run out though the truck never hiccuped. I put a PPE pick up in the truck about two years ago and it never affected what i could get out of the bottom of my tank. i had jsut put 34 gal in a few weeks before rods got shorter
Look on the floor over by the trans station/plasma cutter. My old pickup is over there. You would just need to find a grommet to fit it. Should be the same length or you would need to cut it shorter. You have the big ratchets now and we already picked my bed off. I'll be back in 2 weeks. I can come up then and help you out.
Check out this thread starting at post #16
http://www.dieselplace.com/forum/showthread.php?t=382001&highlight=
That may be the issue for some of you guys.
http://www.dieselplace.com/forum/showthread.php?t=382001&highlight=
That may be the issue for some of you guys.