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Home >> GMC >> 2021 >> Yukon AT4 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L (L84) Or 6.2L (L87) - Specifications >> Specifications >> Ignition System Specifications

Ignition System Specifications

Application Specification
Firing Order 1-8-7-2-6-5-4-3
Spark Plug Wire
  • 170 to 220 Ω per 25.4 mm (1.0 in)
  • { 12633447 } 332 to 460 Ω per 25.4 mm (1.0 in)
Spark Plug Torque Refer to Fastener Specifications 
Spark Plug Gap Refer to:
Engine Mechanical Specifications (L84) , or
Engine Mechanical Specifications (L87)
Spark Plug Type Refer to: Electronic Parts Catalog