Question about 2003 Hummer H2

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How do I remove the spark plug wires?

2003 H2. Spark plug replacement. Do I just pull on the metal tube covering the spark plug to get access to the spark plug? I'm afraid I'll damage the wire if I pull on the wire. Is there a tool I can use on the metal tube?

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The metal tube stays in the heads. They make a special pair of pliers to remove the spark plug boots from the spark plug. You should replace the wires at the same time as the plugs on those models anyway though.

Posted on May 28, 2009

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How to replace spark plug well o-rings 2003 ford taurus 3.0 durtec


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Change spark plugs


  1. Disconnect the spark plug wire at each spark plug.
    • Twist each spark plug 1/2 turn.
    • Pull only on the boot in order to remove the wire from each spark plug.
  1. Disconnect the spark plug wire from the ignition coil.
    • Twist each spark plug boot 1/2 turn.
    • Pull only on the boot in order to remove the wires from the ignition coil
  • Install the spark plug wires at the ignition coil.
  • Install the spark plug wire to each spark plug.
  • Inspect the wires for proper installation:
  • Repeat above procedure for all 8 cylinders.
  • Jun 17, 2013 | 2003 Hummer H2

    1 Answer

    CHANGING SPARK PLUGS 2002 TACOMA 4 CYLINDER


    Starting on the pasenger side. Remove the intake tube running from the air filter box to the throttle body and disconnect enough tubes to swing it out of the way. The sparkplugs are down below the small coils you see at the end of the sparkplug wires. With a 10mm socket remove bolt holding the coil, disconnect the plug at the top of the coil by squeezing it at the top and pulling straight off the coils.

    Pull the coil straight up. there will be about a 6 inch tube that connects to the top of the spark plug when inserted. You will need a 5/8 sparkplug socket and about 2 feet of extensions to make it easy on yourself. Insert the spark plug socket and extensions down the hole you removed the coils with the tube from and remove and replace the sparkplug. Reinstall your coil onto the engine and move to the next one until you have replaced all the plugs on the passenger side.

    Make sure you reconnect all the plugs to the coils, hoses to the intake tube and reinstall your intake tube. The drivers side is a little easier. Pop the spark plug wires from their plastic holders to free enough slack to be able to pull your sparkplug wires out of the block. For the plug closest to the front of the engine you will need to remove the 10mm bolt holding the ground wires to the intake manifold to be able to free enough space for removing the plug.

    For the middle plug you will need to remove the 10mm bolt holding the bracket that is holding one of the throttle cables at the top of the intake manifold. For the rear plug just pop the flexible hose that runs behind the black metal bracket straight up out of its clip and push it out of the way along with any other hoses that run through this area. Pull the spark plug wire from its place by pulling straight up just like with the coils. there will also be about a 6 inch tube running down to the spark plug at the bottom of these plugs.

    Remove and replace the plugs same as before. make sure you reconnect all your hoses and wires to their previous locations. Doublecheck to make sure you reconnect all the ground wires/ brackets. Also you will need to use " twin ground electrode plugs" (see sticker on front of your plastic timing belt cover? to the right of the radiator hose).

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    How are the spark plug tube seals removed?


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    How do I change my H2 06 Ignition coils and spark plugs


    when you open the hood on your H2 the is a cover over the top of the motor. to remove it you have to remove the oil filler cap and pull out the dip stick. when those are removed you should be able to remove the cover by pulling up on the front edge. after that is out of the way the ignition coils are right on top of the spark plugs and are usually held in with 2 bolts per each coil pack. unbolt the coil pack and pull on the coil and it should pull out of the hole( may be stubborn) them find out what size the plugs are and the plugs are in the bottom of the hole

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    Where are the spark plugs located? and how do I get to them?


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    I need the diagram to put the spark plug cables


    2003 Chevrolet Malibu 3.1L SFI OHV 6cyl
    Spark Plug Wires - Removal & Installation

    3.5L Engine
    1. Before servicing the vehicle, refer to the Precautions Section.
      NOTE Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire or the wire could be damaged.
    2. Remove the intake manifold cover, if required.
    3. Disconnect the left side spark plug wires from the spark plugs.
    4. Disconnect the left side spark plug wires from the ignition coil.
    5. Remove the spark plug wire clips from the Manifold Absolute Pressure (MAP) sensor bracket and the heater inlet and outlet pipe tab.
    6. Remove the spark plug wire assembly.
    7. If replacing only one plug wire, open the retaining clips and remove the appropriate spark plug wire.
    8. Disconnect the right side spark plug wires from the spark plugs.
    9. Disconnect the right side spark plugs from the ignition coils.
    10. Remove the spark plug wire assembly.
    11. If replacing only one plug wire, open the retaining clip and remove the appropriate spark plug wire.
    To install:
    1. Install the spark plug wire assembly.
    2. Connect the right side spark plugs to the ignition coils.
    3. Connect the right side spark plug wires to the spark plugs.
    4. If replacing only one plug wire, open the retaining clip and install the appropriate spark plug wire.
    5. Install the spark plug wire assembly.
    6. Connect the left side spark plug wires to the spark plugs.
    7. Connect the left side spark plug wires to the ignition coil.
    8. Install the spark plug wire clips to the MAP sensor bracket and the heater inlet and outlet pipe tab.
    9. If replacing only one plug wire, open the retaining clips and install the appropriate spark plug wire.
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    Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system
    74d742b.jpg


    Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
    306b531.jpg


    Fig. 3.5L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
    9313fa7.jpg


    Fig. 2.4L Engine Firing order: 1-3-4-2 Distributorless ignition system
    2c9af72.jpg


    Fig. 3.1L Engine Firing order: 1-2-3-4-5-6 Distributorless ignition system
    d929c16.jpg


    Fig. 2.2L Engine Firing Order: 1-3-4-2 Distributorless ignition system
    f357cd3.jpg

    Fig. 3.5L & 3.9L Engines Firing order: 1-2-3-4-5-6 Distributorless ignition system
    09e9db9.jpg

    I really hope help you with this (remember rated this help) Good luck.

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