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Home >> GMC >> 1988 >> Forward Control 5.7 K, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Operation >> Diesel Fuel Heater

Diesel Fuel Heater

This option is used to heat fuel when ambient temperature is below 20°F (6-°C). This prevents wax crystals from building up and blocking the fuel filters. The heater is located along the right side of the intake manifold and uses a resistance wire spiralled around the fuel line.