I ahve a 1989 Chevy Suburban and for the past year when the gas gauge reached 3/4 tank I filled up with gas (Regular) and I let the Suburban set up for two moths and I believe the gas went bad. I screwed up and put to much Sta-Bil in tank. Now the motor is skipping. Any sugeggestions?

I've seen a purge solenoid cause issues with filling the tank. Verify tank is not full also.

If you need further help, reach me via phone at https://www.6ya.com/expert/chris_b82b45c59bcf133d

I'm not sure about a Suburban but I have a 2001 Chevrolet truck with two tanks and they empty simultaneously so when the gas gauge says empty that means both tanks are empty.

The problem lies in the sending unit in the tank. It could have a wiring problem or the sending unit is bad.

yes. you'll need to disconnect the fill tube that runs from where you put the gas in to the tank. Then undo the bolts that hold the metal straps that hold the tank up in place. lower the tank and disconnect the metal fuel lines from the assembly on top of the tank itself. turn the assembly cover counter-clockwise by tapping on the circular flange with a screwdriver and hammer. remove and replace the entire assembly. sometimes you can buy just the metal or plastic cyliner pump. if so you can save an awful lot of money. the entire assembly which includes the strainer and fuel gauge mechanism can cost $200-$300 , but the pump alone could be as cheap as $40. if you go the later route, take care with the fuel gauge mechanism. it is delicate...

Here is a website that a free manual can be down loaded for your vehicle


http://ezinearticles.com/?Find-the-Free-Auto-Repair-Manual-You-Need-Online&id=92717

It sounds like the fuel sender is bad in the fuel tank.

Had the same problem fuel pump is done.

there is a fuel senor inside of the tank and it could very well be the problem

The fuel pump and sending unit are one piece and are located inside the fuel tank. They are notorious for trouble and when one goes out, the other follows.

I don't always agree with the dealership and there innovations. It does sound like you need a fuel pump. the sock or p/u tube, at the bottom of the pump has come off. GM fuel pumps are usually good for 100K+ miles but unless you can verify that the filter inside the tank is still doing its job. you may compound your problem by sending unfiltered fuel to your injectors. Good luck.