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Fuel pressure issue

Chevrolet1698

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Chevrolet1698 Enthusiast

Chevrolet1698

Posted
Posted

My 2004 Silverado 4x4 has a gas leak and smell that's coming from the top of the fuel tank, which is getting worse and worse. Like on the day of this post, it started to leak relatively bad at idle. I looked into it, and the sending unit is completely rusted out, yet the fuel pump is still pumping fuel to the injectors like it should. I don't believe you can buy a sending unit by itself. So will I need to replace the whole fuel pump? Or will I need a new gas tank?

txab Senior Enthusiast

txab

Posted
Posted

How can you tell the sending unit, which is sealed in the tank and part of the fuel pump, is rusted out? Are you really talking about the top of the tank being rusted. Or may be the top of the fuel pump being rusted. There are plastic lines on top than can break as well

Swimmer8366 Enthusiast

Swimmer8366

Posted
Posted

My 2004 Silverado 4x4 has a gas leak and smell that's coming from the top of the fuel tank, which is getting worse and worse. Like on the day of this post, it started to leak relatively bad at idle. I looked into it, and the sending unit is completely rusted out, yet the fuel pump is still pumping fuel to the injectors like it should. I don't believe you can buy a sending unit by itself. So will I need to replace the whole fuel pump? Or will I need a new gas tank?

Fuel pumps and sending units are the same unit

 

You will have to actually get in there and find out what's wrong my guess is you got a bad seal or rotted out steal lines everything above the tank are pretty much all plastic.

 

Sent from my Z981 using Tapatalk

Swimmer8366 Enthusiast

Swimmer8366

Posted
Posted

How can you tell the sending unit, which is sealed in the tank and part of the fuel pump, is rusted out? Are you really talking about the top of the tank being rusted. Or may be the top of the fuel pump being rusted. There are plastic lines on top than can break as well

It's probably a broken line/quick connect. There's no steal except for the lines them self to rot out but there not on the tank.

 

Sent from my Z981 using Tapatalk

newdude Senior Enthusiast

newdude

Posted
Posted

My 2004 Silverado 4x4 has a gas leak and smell that's coming from the top of the fuel tank, which is getting worse and worse. Like on the day of this post, it started to leak relatively bad at idle. I looked into it, and the sending unit is completely rusted out, yet the fuel pump is still pumping fuel to the injectors like it should. I don't believe you can buy a sending unit by itself. So will I need to replace the whole fuel pump? Or will I need a new gas tank?

 

Tank is plastic. Put a new fuel pump/sending unit assembly in and see what happens. They are an assembly on 99 and newer trucks. Sending unit comes with the pump if you will.

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