Electronic Ignition System Diagnosis: Notes

WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2003 Hummer H2, 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, and 2003 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Locating Camshaft Position Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 2: Locating Crankshaft Position Sensor

Courtesy of GENERAL MOTORS CORP.

Fig 3: Ignition Coils No. 1, 3, 5 & 7 Electrical Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 4: Ignition Coils No. 2, 4, 6 & 8 Electrical Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 5: Camshaft Position, Crankshaft Position & Knock Sensors Electrical Schematic

Courtesy of GENERAL MOTORS CORP.