GMC Workshop Service and Repair Manuals > G 2500 3/4 Ton Van L6-250 4.1L VIN D 2-bbl (1982) > Relays and Modules | Relays and Modules - Powertrain Management | Relays and Modules - Computers and Control Systems | Electronic Spark Timing <--> [Electronic Spark Control Module] | Component Information | Locations

Engine Control Module > < A/T - Buzzing Noise at Idle|Page 34

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Fig. 46 Typical Electronic Spark System (ESC)

Relays and Modules
Relays and Modules - Powertrain Management
Relays and Modules - Computers and Control Systems
Electronic Spark Timing <--> [Electronic Spark Control Module]
Component Information
Locations

Engine Control Module > < A/T - Buzzing Noise at Idle|Page 34