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How do you Change, Replace, or Install Broken 1995-1999 Chevrolet, GMC Vortec 5700 Engine Spark Plug Replacement

Fits Years: 1995, 1996, 1997, 1998, 1999


Tools required:

  • 5/8 spark plug socket/ratchet with extension

  • 5/8 deep socket/ratchet with extension

  • Flex-joint

  • Needle-Nose Pliers

  • Jack/stands


Step 1: Open the vehicle's hood.

Step 2: Using the jack, lift the vehicle. Support it with the stands.

Step 3: Use the needle-nose pliers to pry and remove the retaining clips (inside the wheel well) that hold the "flaps" closed. By opening these flaps, you can access the spark plugs.


NOTE: When replacing spark plugs, be sure to replace ALL OF THEM at the same time. However, during the installation, we'll be replacing them ONE AT A TIME. In other words, we'll complete the installation for one plug, THEN move onto the next. This ensures that our plug wires don't get "crossed".

Step 4: Twist and remove the spark plug wire from the first spark plug. Using the 5/8 spark plug socket/ratchet, loosen and remove the first spark plug.

Step 5: Most spark plugs come "gapped". However, just to be sure, use a "gapping tool" to measure the plug gap to .060.

Step 6: Tighten the NEW spark plug into place. Be sure not to OVERTIGHTEN it.

Step 7: Connect the spark plug wire to the spark plug.

Step 8: Repeat this process for the remaining spark plugs.



These Part Change / Installation Instructions Apply to
99 1999, 98 1998, 97 1997, 96 1996, 95 1995 Chevrolet, GMC Vortec 5700 Engine Spark Plug Replacement Instructions
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