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 MANUALSCHEVROLET1999PICKUP K1500, 5.7 RREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 449 (HEATING, VENTILATION AND AIR CONDITIONING)
1999 Chevrolet Pickup K1500, 5.7 R
Section 449 (Heating, Ventilation And Air Conditioning)
1999 Chevrolet Pickup K1500, 5.7 RSECTION Section 449 (Heating, Ventilation And Air Conditioning)
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Heating, Ventilation and Air Conditioning
- Leak Testing
- Air Conditioning (A/C) System Performance Test
- A/C System Pressure - Zone Classification
- 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
- Compressor Pressure Relief Valve Replacement
- Sealing Washer Replacement
- Compressor Sealing Washers Replacement
- O-Ring Replacement
- Discharge Hose Replacement
- Suction Hose Replacement
- Evaporator Tube Replacement - Inlet
- Evaporator Tube Replacement - Outlet
- Air Conditioning (A/C) Refrigerant Filter Installation
- Air Conditioning (A/C) Refrigerant Filter Replacement
- Compressor Relay Replacement
- Service Ports Replacement
- Receiver Dehydrator Replacement
- Thermal Expansion Valve Replacement
- Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
- Evaporator Temperature Sensor Replacement
- Condenser Replacement
- HVAC Module Assembly Replacement
- Evaporator Core Replacement
- Heater Hose Replacement - Inlet
- Heater Hose Replacement - Outlet
- Heater Pipe Replacement - Inlet
- Blower Motor Resistor Assembly Replacement
- Mode Linkage Adjustment
- Blower Motor Replacement
- Air Outlet Replacement - Side Window (Aztek)
- Air Outlet Replacement - Side Window (Rendezvous)
- Deflector Replacement - Instrument Panel Air (Aztek)
- Deflector Replacement - Instrument Panel Air (Rendezvous)
- Outlet Replacement - Auxiliary Air - Floor Console (Aztek)
- Outlet Replacement - Auxiliary Air - Floor Console (Rendezvous)
- Air Outlet Replacement - Floor
- Air Outlet Replacement - Center Floor
- Air Outlet Replacement - Rear Floor
- Air Outlet Duct Replacement - Defroster
- Instrument Panel (I/P) Air Outlet Ducts Replacement
- Air Outlet Replacement - Center
- Defogger Outlet Duct Replacement - Side Window (w/o UV6)
- Defogger Outlet Duct Replacement - Side Window (w/UV6)
- Air Temperature Door Replacement
- Air Temperature Door Replacement - Right
- Air Temperature Door Replacement - Left
- Defroster Door Replacement
- Floor Air Door Replacement
- Mode Door Replacement - Secondary (Single Zone)
- Mode Door Replacement - Secondary (Dual Zone)
- Defroster Door Replacement - Secondary
- Mode Door Replacement
- Recirculation Door Replacement
- Heater Core Cover Replacement
- Heater Core Replacement
- Special Tools & Equipment
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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.