full of fuel, gauge reads empty with a light saying its low.
This is a work truck with 330,000 miles, a ladder rack and tool boxes, hope i don't have to remove the bed.
thoughts
full of fuel, gauge reads empty with a light saying its low.
This is a work truck with 330,000 miles, a ladder rack and tool boxes, hope i don't have to remove the bed.
thoughts
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
A stuck float on the fuel level sender? Can you get to the wiring harness to do some electrical tests?
I have a full load in the bed....so getting to the sending unit would be a last resort ( thanks GM for not putting a plate in the bed over the fuel tank sending unit)..
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
Not overly difficult to drop the tank. Lines, wiring, filler neck screws, ground strap, then 2 bolts.
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!
fuel sending unit is $350...I guess I should have one if Im going to lower the tank huh??
anything else I should get while Im in there?
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
Before you get waist deep into this, be sure it is the sender, and not the gage or communication issue. Use a scanner to read the fuel % level. If it matches the gage, then it's likely the sender. If it doesn't, then it's more likely a gage (IPC) or harness issue.
My tank is full, gauge reads empty and the light is on.
I have a CanOBD 2&1 scanner.
am I in the ball park?
My scanner it seems will only get a code, I have no code..what scanner do I need?
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
You have a "code reader", not a scanner. A failed fuel level sender won't set a code. THE scanner is the Tech II, what your dealer and some shops use ($$). Other scanners, such as Snap-On, can do much the same. Other devices, including some power programmers (Predator, In-Tune, Hypertech, Edge) have system parameter scanning abilities, and many of them don't require it to be "married" to the truck just for scanning (borrow one from a friend with a similar truck). In all likelihood, the sender is the problem. However, replacing it is a lot of work, to just find out it isn't the problem.
If I remember correctly, there is a way to send a voltage signal to the instrument cluster gauge and test it to see if it is actually sweeping properly. I don't know that exact technique, but I'm sure someone here does.
I believe that the sender sends the voltage to the ECM which then drives the gauge so there should be data to read and verify. If this was an early truck I would definitely suspect the cluster, but it seems that the later ones have been much more reliable. Still worth some digging.
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!
the 1st thing I noticed was when I filled the tank up, registered 3/4 full then dropped to empty and then went back up to almost full then back down to empty with the warning light lite, and a message saying Im low on fuel.
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
I just dropped the tank on a 03 that i just bought,not a horrible job.
But i have a hoist and a tranny jack.My tank was full so i siphoned out most the fuel.My truck was filty dirty and i couldn't wash it,that was the worst part of the job dealing with a dirty truck/tank.
In your case dropping the tank is the way to go,i had no choice my truck has a wrecker deck on it.
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews
thanks
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
FYI I just swapped the sending unit potentiometer part from a 2005 Dmax into my daughter's 2007 Impala. It seems that they are the same just different float arms. Plugs in up underneath and locks into the bucket same way. I just shortened the wires to match. I swept it on the car before I reinstalled and it worked, just need to get things finished and go fill up in increments to test it.
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!
thanks, Ill be going to O'Reillys tomorrow.
06 1ton 4X4 duramax/6speed ext.cab WT
Hummer wheels :^)
dual lift pump
Banks air intake
I would recommend OE only.
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!