GM Full-Size Trucks 1980-1987 Repair Guide

Throttle Body

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REMOVAL & INSTALLATION



See Figures 1, 2 and 3

  1. Release the fuel pressure at the pressure regulator.
  2.  
  3. Disconnect the THERMAC hose from the engine fitting and remove the air cleaner.
  4.  
  5. Disconnect the electrical connectors at the idle air control, throttle position sensor and the injector.
  6.  
  7. Disconnect the throttle linkage, return spring and cruise control (if equipped).
  8.  
  9. Disconnect the throttle body vacuum hoses, the fuel supply and fuel return lines.
  10.  
  11. Disconnect the bolts securing the throttle body, then remove it.
  12.  
  13. To install, reverse the removal procedures. Replace the manifold gaskets and O-rings.
  14.  



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Fig. Fig. 1: Throttle body installation V6 262 engine



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Fig. Fig. 2: Throttle body installation V8 305 and 350 engines



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Fig. Fig. 3: Throttle body installation V8 454 engine

 
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