LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1990 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System Pressure Test >> Fuel Pressure Relief
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Pressure Relief

Disconnect negative battery cable. Remove fuel filler cap. Since these TBI units contain an internal bleed-down feature, after a short time, system fuel pressure should dissipate.

scientia non olet · About LEMON Manuals