Yukon XL 2500 4WD V8-8.1L VIN G (2004)
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Knock Sensor: Diagram Information and Instructions
Utility/Van Zoning
UTILITY/VAN ZONING
All grounds, in-line connectors, pass-through grommets, and splices have identifying numbers that correspond to where they are located in the vehicle.
The following table explains the numbering system.
Electrical Symbols