1999 Chevy S-10

Tiny
JASONH
  • MEMBER
  • 1999 CHEVROLET S-10
1999 Chevy S-10 6 cyl Two Wheel Drive Automatic

how do I unhook the fuel lines from the fuel pump housing and is there 3 or 4 lines coming off the housing?
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Wednesday, July 16th, 2008 AT 11:39 AM

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Tiny
SWILLIAMS
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There are three lines going to the fuel pump module. Facing it from the rear the left line is a fuel return line, the middle line is a vacuum line (for the EVAP system) and the right line is the fuel main line. Make sure you relieve the fuel pressure first. (To do that remove the cap from the fuel pressure test port under the hood and wrap a rag around it. Then push in on the shrader valve to release any pressure. Now go to the rear lines and you will see two white tabs that stick out of the fitting where it attaches to the line. Push those tabs IN and they will release the fuel line fitting. Have a rag handy to catch the fuel that will leak out. The return line and main line both release the same way. The central vacuum line has a different style connection. You will see an area that looks cut out of the fitting and two sections of the fitting will look bent out. Squeeze those two sections together and pull the line off.
Once you have the pump out remove the two line retainer clips since most modules don't come with them. They can be put back into the fitting on the line so that you can just push the lines onto the new module.

Be CAREFUL when you drop the tank. There is a fitting at the front of the tank and one at the rear that attach to a line on the frame. If you are taking the tank out completely you need to remove those lines.
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Thursday, July 17th, 2008 AT 6:00 PM

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