LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1990 >> Forward Control 4.3 Z, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Gasoline) >> Throttle Body Injector >> Removal (Model 220)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal (Model 220)

  1. Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELIEF (GASOLINE)  in this article. Remove throttle body cover and leave cover gasket in place. Using screwdriver and fulcrum, carefully pry injector out. See Figure. Remove small "O" ring from nozzle end of injector.
  2. Carefully rotate injector fuel filter back and forth to remove fuel filter from base of injector. Remove and discard throttle body cover gasket. Remove large "O" ring and steel back-up washer from top counterbore of throttle body injector cavity.
scientia non olet · About LEMON Manuals