GTO V8-6.0L VIN U (2005)
1. Inspect each spark plug gap. Adjust each plug as needed.
Spark plug gap: 1.01 mm (0.040 in).
2. Hand start the spark plugs in the corresponding cylinders.
NOTE: Refer to Fastener Notice in Service Precautions.
3. Tighten the spark plugs.
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Tighten the 5.7 L engine spark plug on a NEW cylinder head to 20 N.m (15 lb ft).
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Tighten the 5.7 L engine spark plug on subsequent installations to 15 N.m (11 lb ft).
4. Install the spark plug wires.
