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Home›Repair guides›General Motors›Engine Coolant Temperature (ECT) Sensor Replacement

General Motors 8.1 — Engine Coolant Temperature (ECT) Sensor Replacement

Repair & overhaul · ECT sensor

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

Applies to: General Motors 8.1L engine

Procedure

  1. Turn OFF the ignition.
  2. Drain the cooling system below the level of the ECT sensor.
  3. Disconnect the ECT electrical connector.
  4. Remove the ECT sensor.
  5. Coat ECT sensor threads with teflon tape sealant.
  6. Install the ECT sensor.
  7. Reconnect the ECT electrical connector.
  8. Refill the cooling system.

Specs & values

  • Tighten the ECT sensor to 20 N·m (15 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.

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