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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 976 (Engine Controls - 6.6L (Lb7) (Introduction)) >> Repair Instructions >> Engine Coolant Temperature (ECT) Sensor Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  1. If installing the old sensor, coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the ECT sensor (1).

    Tighten:  Tighten the sensor to 20 N.m (15 lb ft).

    3. Fig 1: ECT Sensor
    GM740508Courtesy of GENERAL MOTORS CORP.
  3. Connect the ECT sensor electrical connector (1).
    4. Fig 2: ECT Sensor Electrical Connector
    GM740506Courtesy of GENERAL MOTORS CORP.
  4. Fill the cooling system, if necessary. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
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