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Home >> GMC >> 2002 >> C3500 HD 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 6.5L >> Description and Operation >> Glow Plug System Description >> Glow Plug Relay
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Glow Plug Relay

The glow plug relay is mounted at the rear of the left cylinder head. The glow plug relay is a solid state device which operates the glow plugs.

The PCM uses a ignition voltage signal to control the solid state circuitry of the glow plug relay.

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