GMC Workshop Service and Repair Manuals > K 1500 Truck 4WD V8-350 5.7L (1986) > Powertrain Management | Relays and Modules - Powertrain Management | Relays and Modules - Computers and Control Systems | Electronic Spark Timing <--> [Electronic Spark Control Module] | Component Information | Locations

Typical Electronic Spark System (ESC)|Page 1910 > < Typical Electronic Spark System (ESC)|Page 1908

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Electronic Spark Timing: Testing and Inspection

Use the following procedures to diagnose ESC system malfunctions only. To diagnose general ignition system malfunctions, refer to ``High Energy
Ignition (HEI) System Diagnosis.''

Fig. 5 ESC system wiring schematic. 1984-86 models w/manual 4 speed top loader transmission

Fig. 6 ESC system wiring schematic. 1984-86 models w/manual 3 & 4 speed side loader transmission

Powertrain Management
Relays and Modules - Powertrain Management / Relays and Modules - Computers and Control Systems / Electronic Spark Timing <--> [Electronic Spark Control Module] / Locations
Page 1909

Typical Electronic Spark System (ESC)|Page 1910 > < Typical Electronic Spark System (ESC)|Page 1908

GMC Workshop Service and Repair Manuals

K 1500 Truck 4WD V8-350 5.7L (1986)

Powertrain Management Relays and Modules - Powertrain Management / Relays and Modules - Computers and Control Systems / Electronic Spark Timing <--> [Electronic Spark Control Module] / Locations Page 1909

Powertrain Management Relays and Modules - Powertrain Management / Relays and Modules - Computers and Control Systems / Electronic Spark Timing <--> [Electronic Spark Control Module] / Locations Page 1909

Powertrain Management
Relays and Modules - Powertrain Management / Relays and Modules - Computers and Control Systems / Electronic Spark Timing <--> [Electronic Spark Control Module] / Locations
Page 1909

Powertrain Management
Relays and Modules - Powertrain Management / Relays and Modules - Computers and Control Systems / Electronic Spark Timing <--> [Electronic Spark Control Module] / Locations
Page 1909