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 MANUALSCHEVROLET2013EXPRESS 2500 V8-4.8LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHEATER CORE CASESERVICE AND REPAIR
2013 Chevrolet Express 2500 V8-4.8L
Heater Core Case: Service and Repair
2013 Chevrolet Express 2500 V8-4.8LSECTION Service and Repair
Heater Assembly Replacement
Removal Procedure
1. Remove the evaporator and blower module assembly. Refer to Air Conditioning (A/C) Evaporator and Blower Module Assembly Replacement Air Conditioning (A/C) Evaporator and Blower Module Assembly Replacement.
2. Remove the heater assembly retaining nuts (1) from the engine compartment.
3. Remove the I/P carrier. Refer to Instrument Panel Carrier Replacement Instrument Panel Carrier Replacement.
4. Disconnect the temperature actuator electrical connector.
5. Disconnect the vacuum lines from the actuators.
6. Remove the heater assembly.
Installation Procedure
1. Install the heater assembly.
2. Connect the vacuum lines to the actuators.
3. Connect the temperature actuator electrical connector.
4. Install the I/P carrier. Refer to Instrument Panel Carrier Replacement Instrument Panel Carrier Replacement.
Caution:
Refer to Fastener Caution Fastener Caution.
5. Install the heater assembly retaining nuts (2) to the engine compartment and tighten to 6 Nm (53 lb in).
6. Install the evaporator and blower module assembly. Refer to Air Conditioning (A/C) Evaporator and Blower Module Assembly Replacement Air Conditioning (A/C) Evaporator and Blower Module 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.