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 180 (HEATING, VENTILATION, AND AIR CONDITIONING)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Section 180 (Heating, Ventilation, And Air Conditioning)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Section 180 (Heating, Ventilation, And Air Conditioning)
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.
- Specifications
- Diagnostic Information and Procedures
- Leak Testing
- Air Conditioning (A/C) System Performance Test (LH2 w/ Heavy Duty Cooling)
- Air Conditioning (A/C) System Performance Test (LH2 w/ Standard Cooling)
- Air Conditioning (A/C) System Performance Test (LY7 w/ Heavy Duty Cooling)
- Air Conditioning (A/C) System Performance Test (LC3)
- Air Conditioning (A/C) System Performance Test (LY7 w/Standard Cooling)
- Air Conditioning (A/C) Diagnostics - Pressure Zone A
- Air Conditioning (A/C) Diagnostics - Pressure Zone B
- Air Conditioning (A/C) Diagnostics - Pressure Zone C
- Air Conditioning (A/C) Diagnostics - Pressure Zone D
- Heating Performance Diagnostic
- Defrosting Insufficient
- Noise Diagnosis - Blower Motor
- Noise Diagnosis - Air Conditioning (A/C) System
- Noise Diagnosis - HVAC Module
- Odor Diagnosis
- Repair Instructions
- Odor Correction
- Refrigerant Recovery and Recharging
- Flushing
- Compressor Oil Balancing
- Compressor Replacement (LH2)
- Compressor Replacement (LY7)
- O-Ring Replacement
- Air Conditioning Line/Tube Connector Removal/Replacement
- Condenser Tube Replacement
- Discharge Hose Replacement (LY7)
- Discharge Hose Replacement (LH2)
- Suction Hose Replacement (LH2)
- Suction Hose Replacement (LY7)
- Liquid Line Replacement (LY7/LLT)
- Liquid Line Replacement (LH2)
- Compressor Relay Replacement
- Air Conditioning Refrigerant Desiccant Replacement
- Thermal Expansion Valve Replacement
- Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
- Condenser Replacement (Standard Cooling)
- Condenser Replacement (Heavy Duty Cooling)
- HVAC Module Assembly Replacement
- Air Conditioning Evaporator Core Replacement
- Air Conditioning Evaporator and Blower Module Drain Hose Replacement
- Heater Inlet Hose Replacement (LY7)
- Heater Inlet Hose Replacement (LH2)
- Heater Outlet Hose Replacement (LY7)
- Heater Outlet Hose Replacement (LH2)
- Heater Pipes Replacement
- Passenger Compartment Air Filter Housing Replacement
- Passenger Compartment Air Filter Replacement
- Air Inlet Assembly Replacement
- Air Inlet Housing Front Panel Replacement
- Blower Motor Replacement
- Instrument Panel Air Deflector Replacement
- Instrument Panel Outer Air Outlet Deflector Replacement
- Instrument Panel Outer Air Outlet Upper Duct Replacement - Left Side
- Instrument Panel Outer Air Outlet Upper Duct Replacement - Right Side
- Floor Console Auxiliary Air Outlet Replacement
- Windshield Defroster Duct Replacement
- Defroster Grille Replacement
- Heater Core Replacement
- Special Tools and Equipment
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.