I was changing out my leaking back brake line today when I noticed the gas line after the filter leaking pretty good, I put 70 Bucks in the tank a day before with some fuel system cleaner so I'm thinking thats when it started, But my question is, how hard is it to change a gas line after the fiter? Does anyone know of a place I can see a diagram? Also, my gas gauge is jerking back and fourth about 2,3 8ths when I'm stopped and going still when I'm start moving again. and i'm wondering how thats related to the leak, this started after I filled my tank last night. The last month I've been dumping entire pay checks into this thing and one thing after another goes wrong, my goal is to eventually have so much fixed I can start making it look better and doing a lift. But i don't know if that'll ever happen. When I got the brakes working the piston on the back brake bent the first time I pumped up the brakes, so next I have to replace those

 

Hello Jake,

I copied this from my ALLDATA account.

I don't think the fuel lines can be totally replaced, just repaired.
I could be wrong but that is what I gathered from this.

Fuel Supply/Return/or Emission Pipe Service


MATERIALS

Fuel Lines
These are welded steel tubes, meeting GM Specifications 124-M, or its equivalent. The fuel feed line is 3/8" diameter and the fuel return line is 5/16" diameter.

CAUTION: DO NOT USE COPPER OR ALUMINUM TUBING TO REPLACE STEEL TUBING. Those materials do not have satisfactory durability to withstand normal vehicle vibration.

Coupled hose
These are not to be repaired and are replaced ONLY as an assembly.

Uncoupled hose
Use only reinforced furl resistant hose, made of "Fluoroelastomer" material. Do not use a hose within 4" (100 mm) of any part of the exhaust system, or within 10" (254 mm) of the catalytic converter. The hose's inside diameter must match the outside diameter of the steel tubing.

Clamps
These are stainless steel, screw bank-type clamps, #2494772, or equivalent.

FUEL LINE REPAIR

1. Cut a piece of fuel hose 4" (100 mm) longer than the section of line to be removed. If more than 6" (152 mm) is to be removed, use a combination of steel pipe and hose. The hose length should not be more than 10" total.
2. Cut a section of the pipe to be replaced with a tube cutter. Use the first step of a double flaring tool to form a bead on the ends of the pipe and, also, on the new section of pipe, if used.
3. Slide the hose clamps onto the pipe and push the hose 2" (51 mm) onto each portion of the fuel pipe.
4. Tighten a clamp on each side of the repair.
5. Secure fuel line to the frame.
6. Check for leaks.

Hope this helps.

Mark K

 

Wow thanks for that info, I'm surprised I can't just replace the line, seems like I'll just have to keep chopping away every time one of the rust spots bust threw..

 

Part Detail

If, that is you have 4x4 4dr.

 

Where could I get the same diagram for a 2000 4dr 4X4 Blazer? Would really appreciate it as I am having the same issues and haven't been able to find a fuel line diagram from fuel pump to the rails.