LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2009 >> Cutaway 6.6 6 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 6.6L LMM - Introduction >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

CAUTION: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
    Fig 1: Identifying ECT Sensor
    GM1861925Courtesy of GENERAL MOTORS CORP.
  1. If installing the old sensor(s), coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent.
    2. CAUTION: Refer to Fastener Caution .
  2. Install the appropriate ECT sensor(s) (1) and tighten to 20 N.m (15 lb ft).
    3. Fig 2: Identifying ECT Sensor
    GM1861923Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine wiring harness electrical connector(s) (1) to the appropriate ECT sensor(s).
  4. Fill the cooling system, if necessary. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac N Fill) .
  5. Install the intake manifold tube. Refer to Intake Manifold Tube Replacement (LMM) .
scientia non olet · About LEMON Manuals