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Home >> Chevrolet >> 2018 >> Express 3500 Base, Van Cargo Extended, 6.0L Eng VIN G >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 6.0L (L96 LC8) - Repair Instructions >> Repair Instructions >> Spark Plug Replacement >> Installation Procedure

Installation Procedure

  1. If using NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped. Ignition System Specifications
  2. If reusing the spark plugs, inspect for wear or damage. Spark Plug Inspection 
  3. GM4859492Courtesy of GENERAL MOTORS COMPANY

    Install the spark plug (1) and tighten by hand.

    4. CAUTION:

    Refer to Component Fastener Tightening Caution .

  4. Tighten the spark plug (1) to:
    • Used Head: 15 N.m (11 lb ft)
    • New Aluminum Head: 20 N.m (15 lb ft)
    • New Iron Head: 30 N.m (22 lb ft)
  5. Connect the spark plug wire to the spark plug. Spark Plug Wire Replacement 
  6. Engine Cover - Install - Engine Cover Replacement
  7. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (Single Battery)Battery Negative Cable Disconnection and Connection (Dual Battery)
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