Heating and Air Conditioning: Technical Service Bulletins

• Customer Interest
  • Body - Broken Rear Window Defogger Grid Detection
  • A/C - Musty Odors Emitted From (HVAC) System
  • Windshield, Driver Side - Insufficient Defrosting
  • A/C - Water Leaks from Rear A/C into Rear Compartment
  • A/C Compressor - Loud Knocking Noise
  • A/C - Fan Only Operates on High Speed
  • A/C - Odor at Start up in Humid Climates
  • A/C Control - Recirculation Mode Inoperative
  • A/C - Control Knob Spins Freely
• By Symptom
  • Abnormal wear/deterioration
    • A/C - R-134a System Flushing Procedures
  • Customer Interest
    • Body - Broken Rear Window Defogger Grid Detection
    • A/C - Musty Odors Emitted From (HVAC) System
    • Windshield, Driver Side - Insufficient Defrosting
    • A/C - Water Leaks from Rear A/C into Rear Compartment
    • A/C Compressor - Loud Knocking Noise
    • A/C - Fan Only Operates on High Speed
    • A/C - Odor at Start up in Humid Climates
    • A/C Control - Recirculation Mode Inoperative
    • A/C - Control Knob Spins Freely
  • Erratic Operation
    • A/C - Fan Only Operates on High Speed
    • A/C Control - Recirculation Mode Inoperative
  • Inoperative
    • A/C Control - Recirculation Mode Inoperative
  • Leaks
    • A/C - Water Leaks from Rear A/C into Rear Compartment
    • A/C - R134a Leak Detection With Tracer Dye
  • Noise
    • A/C Compressor - Loud Knocking Noise
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Odor at Start up in Humid Climates
  • Poor performance
    • Windshield, Driver Side - Insufficient Defrosting
    • A/C Control - Recirculation Mode Inoperative
• All Technical Service Bulletins
  • Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
  • Vehicle - Engine And Sub-Systems Flushing Recommendations
  • Body - Broken Rear Window Defogger Grid Detection
  • A/C - Musty Odors Emitted From (HVAC) System
  • A/C - R-134a System Flushing Procedures
  • A/C - System Sealers/Leak Detection Guidelines
  • Windshield, Driver Side - Insufficient Defrosting
  • A/C - PureGuard 2 Operating Alert
    • Overview
    • Refrigerant Recovery
    • Oil Injection and Refrigerant Charging
    • Additional ACR4 Operation and Maintenance Tips
    • Tank-to-Tank Refrigerant Transfer
    • Excess Air In Tank
    • Pureguard 2 Error Codes
    • Active Flow Control
  • A/C - Tool And Equipment Maintenance
  • A/C - Systems With R12 Or R134a Service Issue
    • Overview
    • R12 System Retrofitting to R134A
    • Servicing R134A Retrofitted Vehicle Systems
    • R12 and R134A Refrigerants Are Not Interchangeable
    • J 41810 Pureguard 2 R134A Refrigerant Monitor
    • Summarizing GM's A/C Service Recommendations
  • A/C - Water Leaks from Rear A/C into Rear Compartment
  • A/C - Insufficient Cooling Diagnosis Table Updated
  • Tools - A/C Leak Detector Maintenance Kit Availability
    • Overview
    • Service Procedure
  • A/C Compressor - Loud Knocking Noise
  • A/C Compressor Seal Washer - Reference Chart
  • A/C - Unnecessary Compressor Replacement
  • Blower Motor - Revised Chart
  • A/C - Fan Only Operates on High Speed
  • A/C - Odor at Start up in Humid Climates
  • A/C Control - Recirculation Mode Inoperative
  • A/C - Control Knob Spins Freely
  • A/C - R134a Leak Detection With Tracer Dye
  • A/C - R12 or R134a Service Recommendations
    • Overview
    • R12 Service Recommendations
    • R134A Service Recommendations
  • A/C - Refrigerant Recovery/Recharge Equipment
  • A/C - New PAG Oil
  • A/C - Contaminated R134A Refrigerant
  • A/C - Refrigerant Recovery/Recycling/Equipment
  • Cooling System, A/C - Aluminum Heater Cores/Radiators