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.

2005 Chevrolet Avalanche 2500FACTORY OEM SERVICE PROCEDURE

Removal Procedure

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

Fig 1: View Of Ignition Coil, ECT And MAP Sensor Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Drain the cooling system to a level below the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System in Engine Cooling.
Disconnect the ECT sensor electrical connector (3).

Fig 2: Removing/Installing ECT Sensor Electrical Connector At Oil Fill Tube Bracket

Courtesy of GENERAL MOTORS CORP.

Remove the ECT sensor electrical connector from the oil fill tube bracket.

Fig 3: Removing/Installing ECT Sensor

Courtesy of GENERAL MOTORS CORP.

Remove the ECT sensor.

Factory Service Tools

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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.