Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006CHEVY EXPRESS G3500, VAN CARGO, 4.8 VREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM - 6.6L (LLY) - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENTINSTALLATION PROCEDURE

2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 V

Installation Procedure

2006 Chevrolet Chevy Express G3500, Van Cargo, 4.8 VSECTION Installation Procedure

WARNING: This page is about a different variant/trim than selected.

NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

Fig 1: Locating Coolant Temperature Sensor

Courtesy of GENERAL MOTORS CORP.

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 .

Install the ECT sensor (1).
Tighten: Tighten the sensor to 20 N.m (15 lb ft).

Fig 2: View Of Engine Coolant Temperature Sensor And Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Connect the ECT sensor electrical connector.
Fill the cooling system, if necessary. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac N Fill) .
Install the brace to the intake air heater-to-generator bracket.
Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.