How does the gas tank work in a GMC?
How does the gas tank work in a GMC?
Quick google search says that onboard computer monitors the fuel level in both tanks and averages the fuel remaining to show on your gauge. The primary fuel pump is in the front tank. When the level in the front tank drops, it sends a signal via a fuel pump relay to trigger the rear fuel pump to send fuel to the front tank.
Why does my gas gauge not work on my GMC Truck?
Trucks of that “era” had a problem with the gauge cluster that would make the fuel gauge (and/or other gauges) not work. Quick google search says that onboard computer monitors the fuel level in both tanks and averages the fuel remaining to show on your gauge.
How does the fuel balance pump in a Chevy truck work?
The low pressure, about 32 kPa (7 psi) fuel balance pump is used only to transfer fuel from the auxiliary tank to the main tank in order to balance the fuel levels in both tanks. As the main tank level drops to about 25 percent below the level in the auxiliary tank, the fuel sender and balance module energizes the fuel pump relay.
Where is the dual tank balance module located?
This module is located by the front (main) lift pump. Slightly toward the rear of vehicle along the frame rail. On top of this module is a fuel pump balance relay, it turns the rear pump on as needed to transfer fuel. At the module, you have a harness with 6 wires. Unplug it and check the following with a digital volt/ohm meter
Quick google search says that onboard computer monitors the fuel level in both tanks and averages the fuel remaining to show on your gauge. The primary fuel pump is in the front tank. When the level in the front tank drops, it sends a signal via a fuel pump relay to trigger the rear fuel pump to send fuel to the front tank.
Trucks of that “era” had a problem with the gauge cluster that would make the fuel gauge (and/or other gauges) not work. Quick google search says that onboard computer monitors the fuel level in both tanks and averages the fuel remaining to show on your gauge.
This module is located by the front (main) lift pump. Slightly toward the rear of vehicle along the frame rail. On top of this module is a fuel pump balance relay, it turns the rear pump on as needed to transfer fuel. At the module, you have a harness with 6 wires. Unplug it and check the following with a digital volt/ohm meter
What happens if there is no fuel in the front tank?
No fuel in front tank,back tank full no way to get it their =1/2 tank of fuel truck won’t run Same problem here. Both tanks fulled, go down the road for 150 or so miles. get two notches on fuel gage below a half tank marking, and the engine shuts down with a full tank in the rear and nothing in the front.
Why are there two gas tanks but no selector switch?
It has two gas tanks but no selector switch, and it seems to pull gas from both sending units at the same time, while keeping track of the total fuel amount. I tried installing a new sending unit in each tank, but that didn’t solve the issue.
What happens when you turn off the relay on a gas tank?
Contacts in this switch close and send 12 volts to the fuel pump. The system will stay in this configuration until you turn the key off or the engine looses oil pressure. The 3 second operation of the fuel pump by the relay is to prime the fuel system, this makes the engine easier to start.
Why is my gas tank missing on my 1987 car?
Bad selector switch in the dash. Ground is missing on the tank. The large O ring that seals the sender unit in the top of the tank also electrically isolates it from the tank and the rubber straps that hold the tank in place isolates it from the chassis.
What kind of gas tank does a Chevy pickup use?
Tank’s, Inc. offers gas tanks for your 1935-1991 Chevy Pickup and are available in Poly, Alloy coated Steel and Stainless Steel. Tank’s, Inc. also sells In-Tank fuel pumps for your special project. Call one of our sales staff for more information at 877-596-3842.
How big is the gas tank on a GMC van?
This item is currently Out of Stock 4-6 Weeks! IGM26C Gas Tank for 1987-1996 Chevrolet, GMC G-Series Van, 33 Gallon. Gas Engine
It has two gas tanks but no selector switch, and it seems to pull gas from both sending units at the same time, while keeping track of the total fuel amount. I tried installing a new sending unit in each tank, but that didn’t solve the issue.
Is there a 2004 Chevy dump truck with dual fuel tanks?
2004 Chevy 1 ton dump truck with dual fuel tanks, one forward one aft. I believe it came from the factory with both tanks, not an aftermarket setup. Gas not diesel.
What happens when the main fuel tank is empty?
When the level in the main tank reaches a level slightly higher than the level in the auxiliary tank, or the auxiliary tank is empty, the module de-energizes the balance pump relay and fuel pump.
Why are there two gas tanks in my GMC 3500?
Gmc Two Gas Tanks Why No Selector Switch. Hows It Work? My 02 GMC 3500 Dump fuel gauge is broken. The gas gauge shows E and the fuel message board says low fuel. It has two gas tanks but no selector switch, and it seems to pull gas from both sending units at the same time, while keeping track of the total fuel amount.
How does rear tank transfer pump two tank system work?
There have been a few old threads about this, but since it happen to me a few weeks back I thought I would bring this back up for the next guy. For those of us with the two tank arrangement, there is a transfer pump that moves fuel from the rear tank into the front tank as the front tank drops level.
Why does my GM car say no start no crank?
How to diagnose a no start no click on GM vehicle. If you have a late model GM vehicle and turn the key only to hear nothing, you’ll most likely think you have a dead battery—and you may. But a no start, no crank, no click condition can be far more involved than that.
