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Home >> GMC >> 1992 >> Yukon V8-393 6.5L DSL Turbo >> Repair and Diagnosis >> Powertrain Management >> Glow Plug System >> Description and Operation >> Glow Plug Control System
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Glow Plug Control System

Glow Plug Circuit:





Purpose:
The glow plug system is used to preheat the chamber as an aid to cold starting.

Operation:
In the diesel engine, air alone is compressed in the cylinder, then after the air has been compressed a charge of fuel is sprayed into the cylinder and ignition occurs due to the heat of compression.

The glow plug system consists of an integral-electronic control/glow plug relay assembly, 6 volt glow plugs, and a "GLOW PLUGS" lamp.