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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 182 (HVAC SYSTEM - AUTOMATIC)REPAIR INSTRUCTIONSAIR CONDITIONING REFRIGERANT TEMPERATURE SENSOR REPLACEMENTINSTALLATION PROCEDURE

2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Installation Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Installation Procedure

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

Add refrigerant oil to the evaporator core. Refer to Refrigerant System Capacities .
Install the new evaporator core seals to evaporator.

Fig 1: Removing/Installing Evaporator Sensor And Harness

GM802751

Courtesy of GENERAL MOTORS CORP.

Install the evaporator sensor and harness to the evaporator.

Fig 2: View Of Evaporator Core

GM1378986

Courtesy of GENERAL MOTORS CORP.

Install the evaporator core.

Fig 3: HVAC Module

GM1378984

Courtesy of GENERAL MOTORS CORP.

Connect the HVAC module case halves together.

Fig 4: View Of HVAC Module Wiring Harness & Evaporator Core Temperature Sensor Connector

GM1379003

Courtesy of GENERAL MOTORS CORP.

Reposition and connect the HVAC Module wiring harness (1).

Fig 5: View Of HVAC Module Retainer Clips

GM1379007

Courtesy of GENERAL MOTORS CORP.

Install the HVAC module retainer clips.

Fig 6: View Of HVAC Module Case Screws

GM1379002

Courtesy of GENERAL MOTORS CORP.

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.