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Home >> GMC >> 1990 >> Forward Control 3.9 L >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Gasoline) >> Fuel System Pressure Relief (Gasoline) >> Model 220 TBI Unit
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Model 220 TBI Unit

WARNING: Fuel pressure is relieved and drops to zero when ignition is turned off. To minimize the risk of fire and personal injury, cover area to be disconnected with a shop rag.
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