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