LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1987 >> Forward Control 4.8 T, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - TBI >> Testing >> Fuel System Pressure Relief
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel System Pressure Relief

  1. On 2.5L engine, remove "FUEL PUMP" fuse from fuse block. Crank engine. Engine will start and run until fuel supply remaining in fuel lines is used. Engage starter for about 3 seconds to remove any remaining fuel. With ignition off, replace fuse.
  2. On all other engines, 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. After use, place rag in approved container.
scientia non olet · About LEMON Manuals