LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2012 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 4.8L, 5.3L, 6.0L - Repair Instructions >> Repair Instructions >> Spark Plug Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

    Fig 1: View Of Spark Plug And Sparkplug Seat
    GM14824Courtesy of GENERAL MOTORS COMPANY
  1. Inspect each spark plug gap. Adjust each plug as needed.

    Specification 

    Spark plug gap: 1.01 mm (0.040 in)

  2. Hand start the spark plugs in the corresponding cylinders.
    3. CAUTION:

    Refer to Fastener Caution .

  3. Tighten the spark plugs for used heads to 15 N.m (11 lb ft). Tighten the spark plugs for new aluminum heads to 20 N.m (15 lb ft). Tighten the spark plugs for new iron heads to 30 N.m (22 lb ft).
  4. Install the spark plug wires. Refer to Spark Plug Wire Replacement .
scientia non olet · About LEMON Manuals