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How to Replace Fuel Lines 88-98 GMC K1500

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How to Replace Fuel Lines 88-98 GMC K1500

Created on: 2017-04-13

Need to replace the fuel lines? Learn how to do the job properly and safely with expert help in this how-to video

  1. step 1 :Removing the Air Intake
    • Release the air box latches
    • Pull off the air box cover
    • Disconnect the intake air temperature sensor
    • Disconnect the mass air flow sensor
    • Remove the breather line from the intake hose
    • Loosen the thumbscrews from the intake hose
    • Pull off the intake hose
  2. step 2 :Removing the Fuel Lines
    • Remove the Shrader valve cap
    • Bleed any pressure from the fuel system with a small screwdriver
    • Remove the two T20 Torx screws from the distributor cap
    • Push the distributor cap aside
    • Loosen the fuel fittings at the back of the fuel lines with a 16mm wrench
    • Remove the 10mm bolt from the rear fuel line bracket
    • Remove the two 8mm nuts that connect the fuel lines to the injector
    • Lift off the fuel line bracket
    • Pry the fuel lines out of the housing with a flat blade screwdriver
    • Pull off the fuel lines
  3. step 3 :Installing the Fuel Lines
    • Line up the fuel lines
    • Connect the fuel lines to the housing
    • Put the fuel line bracket into place
    • Fasten the two 8mm nuts onto the fuel injector bracket
    • Line up the fuel line fittings
    • Tighten the two fittings with a 16mm wrench
    • Fasten the 10mm nut onto the rear fuel line bracket
    • Twist on the Schrader valve
    • Line up the distributor cap
    • Insert the two T20 screws into the distributor cap
  4. step 4 :Installing the Air Intake
    • Line up the air intake with the throttle body
    • Fasten the thumbscrew onto the air intake stud
    • Connect the intake hose to the air filter
    • Connect the mass air flow sensor
    • Connect the intake air temperature sensor
    • Line up the air box cover
    • Clip on the air box latches
    • Connect the breather hose to the intake hose

Tools needed for replacement

  • Ratchets & Related

    Socket Extensions


  • Screwdrivers & Related

    Flat Blade Screwdriver

  • Sockets - Metric

    8mm Socket

  • Star Drivers & Sockets

    T20 Driver

Installation Video
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Hi, I'm Mike from 1A Auto. We've been selling auto parts for over 30 years. We're dedicated to delivering quality auto parts, expert customer service, fast and free shipping, all backed by our 100% satisfaction guarantee. Visit us at, your trusted source for quality auto parts.

In this video, we're going to be working with our 1996 GMC Sierra K1500. We're going to show you how to remove and replace the fuel lines from your injection unit to the back of the engine on a V8. If you like this video please click subscribe. We have a ton more information on this and many other vehicles, and if you ever need parts for your truck, you can follow the link down in the description over to Here are the items you'll need for this repair.

Lift up on the latches and remove the upper portion of your air box. Unplug the intake air temp and mass air flow sensors. Pop the breather line off and undo the thumb screw. Rock the upper part of the intake forward and remove it from the vehicle.

You'll notice we've removed several other electrical connectors, breather hoses, and other various components. This is not necessarily a requirement to remove these lines, but you may want to move some things out of the way to get better access to the fuel lines.

Remove the cap on the fuel schrader valve. It's usually best to use a fuel pressure test tool to thread on there, which usually has a relief hose on it that you can place into an appropriate container. You just want to push down here and make sure you bleed off any pressure in the fuel system.

Using the T20 Torx driver, or you can use a screwdriver and a bit or a ratchet like I am here, remove the two screws securing the distributor cap onto the distributor. Now we're only doing this to gain access to the fuel lines, so you should just be able to unscrew the cap and push it back and out of the way without undoing any of your plug wires. If you do find the need to undo your plug wires, just be sure to mark where they came off of so they all go back in the same place. Now, you're not going to be able to see the other T20 because it's on the backside of the cap, but you can see the little indent there and just kind of do that one by feel. Where this screw is hard to reach and see and you don't want to drop it, I suggest lifting up on the cap while you unscrew it to keep it in there.

Once it's out, it should be a little easier to pop out and keep your hands on. We're going to just move this out of the way. Using a 16 millimeter flare nut wrench, loosen the fuel fittings on the back of the fuel lines. These are down behind the intake on the driver's side. Then remove the 10 millimeter bolt securing the fuel like bracket to the back of the engine block. We'll do this with the 10 millimeter socket ratchet and extension.

Remove the two 8 millimeter nuts securing the fuel lines onto the injector bracket, here.You'll want to lift the bracket off first. There's the little hold down that we just unscrewed, there. Remove that and then pull the fuel lines out of the housing. You may need a little help prying these up. Remove those fuel lines completely.

Reinstall the fuel lines. Reinstall the hold down bracket and the two eight millimeter nuts. Reinstall the fuel lines by getting the flare nuts lined up and threaded in, and tightening them down with a 16 millimeter wrench. You can then reinstall the 10 millimeter hold down bolt to the fuel line bracket. Make sure you reinstall the cap on the fuel schrader valve. Reinstall your distributor cap and the two T20 Torx screws. I recommend doing the one in the front first because you can see it and line everything up, and it's easier to install the back one after that.

Reinstall the intake tube by hooking the tab over the front of the throttle body and setting the back into place. Reinstall the thumb screw on the stud. Reinstall the tube into the filter as well as locking it into the back of the air box. Reconnect your mass air flow and intake air temp sensors. Drop the lid back into place. Secure the tabs. Install the breather line, and you're good to go.

Thanks for watching. Visit us at for quality auto parts, fast and free shipping, and the best customer service in the industry.

Tools needed for replacement:

    Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 8mm Socket

  • Star Drivers & Sockets

  • T20 Driver

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