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General Motors 4.3L GM Engine — Throttle Body Removal/Installation

Repair & overhaul

For the General Motors 4.3L GM Engine, from the General Motors service manual.

Before you start

  • Lightly lubricate the O-ring of the Mixer to throttle body assembly with Vaseline or petroleum jelly prior to installation.

Procedure

  1. Disconnect the negative battery cable.
  2. Remove Fuel Mixer (refer to Fuel Mixer procedure).
  3. Remove Throttle Body electrical connector.
  4. Remove four screws securing the Throttle Body to the Adapter.
  5. Remove Throttle Body and O-ring between Throttle Body and Adapter.
  6. Installation: inspect/replace O-ring, place on adapter, secure with four screws, torque to 12 N·m (106 in. lbs.).
  7. Install Fuel Mixer.
  8. Reconnect negative battery cable and start engine; verify correct operation in all throttle ranges.

Specs & values

  • Throttle Body screws 12 N·m (106 in. lbs.)

Source: General Motors service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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