Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›General Motors›Heated Oxygen (HO2) Sensor Replacement

General Motors 8.1 — Heated Oxygen (HO2) Sensor Replacement

Repair & overhaul · Heated oxygen sensor

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

Applies to: General Motors 8.1L engine

Before you start

  • Never solder HO2 wires; do not repair the pigtail, connector or terminals.

Procedure

  1. Disconnect the negative battery cable.
  2. Disconnect the HO2 sensor electrical connector.
  3. Remove the HO2 sensor from the exhaust.
  4. Coat threads of the HO2 sensor with anti-seize compound GM P/N 5613695 if necessary.
  5. Install the HO2 sensor.
  6. Reconnect the HO2 sensor electrical connector.
  7. Reconnect the negative battery cable.

Specs & values

  • Tighten the HO2 sensor to 41 N·m (30 lb. ft.).

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.

More General Motors repair guides →