Avalanche 2500 4WD V8-8.1L VIN G (2003)
Spark Plug: Specifications
Spark Plug Gap ........................................................................................................................................................................................ 1.52 mm (0.060 in)
Spark Plug Torque
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Tighten the plug to 20 Nm (15 lb ft) for USED heads
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Tighten the plug to 30 Nm (22 lb ft) for NEW heads