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Ignition System Specifications

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Ignition System Specifications

Application Specification
Metric English
Firing Order 1-8-7-2-6-5-4-3
Spark Plug Wire Resistance 1000 ohms per ft
Spark Plug Torque 15 N.m 11 lb ft
Spark Plug Gap 1.52 mm 0.060 in
Spark Plug Type 25171803 [AC plug type]
12567759 [NGK plug type]