Evaporator Core: Service and Repair

2013 GMC Sierra Denali AWD V8-6.2LSECTION Service and Repair



Air Conditioning Evaporator Core Replacement

Removal Procedure





1. Remove the HVAC module. Refer to Air Conditioning and Heater Module Assembly Removal and Installation Service and Repair.

2. If equipped remove the heat stakes (1) from the HVAC module (2) with a screw driver and a hammer.

3. Disconnect all wiring connections from blower motor, blower motor control module and sensors. Also, remove all wiring from retainers before removal.





4. If equipped remove the screws from the HVAC module assembly.

5. Remove the evaporator cowl gasket from the evaporator.

6. Separate the upper HVAC module assembly (2) from the lower HVAC module assembly (1)





7. Remove the evaporator core (1) from the upper HVAC module assembly (2).

Installation Procedure

Note:
If replacing the evaporator core, add the refrigerant oil to the evaporator core. Refer to Refrigerant System Specifications (Non-HP2) Capacity Specifications.





1. Install the evaporator core (1) to the HVAC module assembly (2).





2. Install the upper HVAC module assembly (2) from the lower HVAC module assembly (1)

3. Install the evaporator cowl gasket to the evaporator.

Caution:
Refer to Fastener Caution Fastener Caution.

4. Install the screws to the HVAC module assembly.

Tighten the screws to 2 Nm (18 lb in).

5. Install the HVAC module assembly. Refer to Air Conditioning and Heater Module Assembly Removal and Installation Service and Repair.

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.