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Home›Repair guides›General Motors›Throttle Body Assembly Replacement

General Motors 8.1 — Throttle Body Assembly Replacement

Repair & overhaul

For the General Motors 8.1, from the General Motors service manual.

Applies to: General Motors 8.1L engine

Before you start

  • Do not use a cleaner that contains methyl ethyl ketone.
  • Safety glasses must be worn when using compressed air.

Procedure

  1. Disconnect the negative battery cable.
  2. Remove the flame arrestor/air filter, breather hoses and gasket.
  3. Disconnect the electrical connectors from the IAC valve and the TP sensor.
  4. Disconnect the throttle linkage and return spring(s).
  5. Remove the throttle body assembly attaching nuts.
  6. Remove the throttle body assembly and gasket.
  7. Install a new throttle body gasket.
  8. Install the throttle body assembly and attaching nuts.
  9. Reconnect the throttle linkage and return spring(s).
  10. Reconnect the electrical connectors to the IAC valve and TP sensor.
  11. Install the flame arrestor/air filter, breather hoses and gasket.
  12. Reconnect the negative battery cable.

Specs & values

  • Tighten the throttle body assembly attaching nuts to 10 N·m (89 lb in).

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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