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.

Fig 1: Locating ECT Sensor

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

If installing the old sensor, coat the threads with sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent.
Install the ECT sensor.
Tighten: Tighten the sensor to 50 N.m (37 lb ft).

Fig 2: Locating ECT Sensor Electrical Connector At Oil Fill Tube Bracket

Courtesy of GENERAL MOTORS CORP.

Install the ECT sensor electrical connector to the oil fill tube bracket.

Fig 3: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Connect the ECT sensor electrical connector (3).
Refill the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.