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 MANUALSCHEVROLET2003AVALANCHE 1500 2WD V8-5.3L VIN TREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCONTROL MODULE HVACSERVICE AND REPAIRHVAC SYSTEM - AUTOMATICPRIMARY
2003 Chevrolet Avalanche 1500 2WD V8-5.3L VIN T
Primary
2003 Chevrolet Avalanche 1500 2WD V8-5.3L VIN TSECTION Primary
REMOVAL PROCEDURE
1. If equipped, remove the sound insulator panel.
2. Disconnect the electrical connector at the blower motor.
3. Disconnect the electrical connector (4) from the blower motor control processor (2).
4. Remove the blower motor control processor retaining screws (3) from the HVAC module (1).
5. Remove the blower motor control processor (2) from the HVAC module (1).
INSTALLATION PROCEDURE
1. Install the blower motor control processor (2) to the HVAC module (1).
2. Install the blower motor control processor retaining screws.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector (4) to the blower motor control processor (2).
4. Connect the electrical connector at the blower motor.
5. If equipped, install the sound insulator panel.
1. If equipped, remove the sound insulator panel.
2. Disconnect the electrical connector at the blower motor.
3. Disconnect the electrical connector (4) from the blower motor control processor (2).
4. Remove the blower motor control processor retaining screws (3) from the HVAC module (1).
5. Remove the blower motor control processor (2) from the HVAC module (1).
INSTALLATION PROCEDURE
1. Install the blower motor control processor (2) to the HVAC module (1).
2. Install the blower motor control processor retaining screws.
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten
Tighten the screws to 1.6 N.m (14 lb in).
3. Connect the electrical connector (4) to the blower motor control processor (2).
4. Connect the electrical connector at the blower motor.
5. If equipped, install the sound insulator panel.
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.