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Home >> Hummer >> 2009 >> H3T Alpha >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - Introduction >> Specifications >> Ignition System Specifications
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Ignition System Specifications

Application Specification
Metric English
Firing Order 1-8-7-2-6-5-4-3
Spark Plug Wire Resistance 397-1,337 ohms
Spark Plug Torque 15 N.m 11 lb ft
Spark Plug Gap 1.02 mm 0.040 in
Spark Plug Type GM P/N 12571164
AC Spark Plug P/N 41-985
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