LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1988 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Diesel >> Operation >> Diesel Fuel Heater
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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.