Heating and Air Conditioning: Technical Service Bulletins

• Recalls
  • Campaign - Air Conditioning Condenser
    • Overview
    • Vehicles Involves, Owner Notification, Dealer Campaign - Parts Information
    • Service Procedure, Campaign Label, Claim and Recording Completion Information
    • Owner Letter Information
• Customer Interest
  • Body - Broken Rear Window Defogger Grid Detection
  • A/C - Musty Odors Emitted From (HVAC) System
  • A/C - Odor
  • A/C Compressor Clutch - Rattle
  • A/C - Compressor Clutch Inoperative
  • A/C - Odors On Hot/Humid Start Up
    • Overview
    • Afterblow Module Operation:
    • Afterblow Module Input/Output
    • After Module Circuit Diagrams:
    • Installation Precautions:
    • Testing the Afterblow Module:
  • A/C - Evaporator Core Freezes
  • A/C - Temperature Control Hard to Operate/Inoperative
  • Fuse Block - Deforms, Rewire A/C Blower Fuse 12
  • A/C Control Knobs - Fall Off
• By Symptom
  • Customer Interest
    • Body - Broken Rear Window Defogger Grid Detection
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Odor
    • A/C Compressor Clutch - Rattle
    • A/C - Compressor Clutch Inoperative
    • A/C - Odors On Hot/Humid Start Up
      • Overview
      • Afterblow Module Operation:
      • Afterblow Module Input/Output
      • After Module Circuit Diagrams:
      • Installation Precautions:
      • Testing the Afterblow Module:
    • A/C - Evaporator Core Freezes
    • A/C - Temperature Control Hard to Operate/Inoperative
    • Fuse Block - Deforms, Rewire A/C Blower Fuse 12
    • A/C Control Knobs - Fall Off
  • Inoperative
    • A/C - Compressor Clutch Inoperative
    • A/C - Temperature Control Hard to Operate/Inoperative
  • Loose
    • A/C Control Knobs - Fall Off
  • Noise
    • A/C Compressor Clutch - Rattle
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Odor
  • Overheating
    • Fuse Block - Deforms, Rewire A/C Blower Fuse 12
  • Poor performance
    • A/C - Delayed Cooling After Engine Start Up
    • A/C - Compressor Clutch Inoperative
    • A/C - Evaporator Core Freezes
    • Campaign - Air Conditioning Condenser
      • Overview
      • Vehicles Involves, Owner Notification, Dealer Campaign - Parts Information
      • Service Procedure, Campaign Label, Claim and Recording Completion Information
      • Owner Letter Information
  • Recalls
    • Campaign - Air Conditioning Condenser
      • Overview
      • Vehicles Involves, Owner Notification, Dealer Campaign - Parts Information
      • Service Procedure, Campaign Label, Claim and Recording Completion Information
      • Owner Letter Information
  • Smoke, Fumes
    • A/C - Odors On Hot/Humid Start Up
      • Overview
      • Afterblow Module Operation:
      • Afterblow Module Input/Output
      • After Module Circuit Diagrams:
      • Installation Precautions:
      • Testing the Afterblow Module:
  • Stiff controls
    • A/C - Temperature Control Hard to Operate/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 Refrigerant Information
  • 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 - Retrofitting R-12 to R-134a
    • Overview
    • A. Retrofit Procedure
      • Notes on Retrofit
      • Compressors
      • Accumulator /Dryer
      • High Pressure Cut-Off Switch (HPCOS)
      • Platform Details
      • Compressor Replacement Chart
      • Compressor Availability
      • Geo Models
      • 1985-88 Nova, 1989-93 Prizm (S)
      • 1985-88 Sprint, 1989-93 Metro (M)
      • 1989-93 Tracker
      • 1985-89 Spectrum and 1990-93 Storm (R)
    • B. General Information
    • C. Parts Information
    • D. Warranty Information
  • 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
  • Tools - A/C Leak Detector Maintenance Kit Availability
    • Overview
    • Service Procedure
  • A/C - Use of Alternate Refrigerants to R-12
  • A/C - O-Ring Identification Chart
  • A/C - Delayed Cooling After Engine Start Up
  • A/C Refrigerant - Contamination
  • A/C - Charging Capacities Chart
  • A/C - CFC Reduction & Refrigerant Recovery/Recycling
  • A/C - Odor
  • A/C - Leak Test
  • Electrical Systems - Isolation Diode Replacement
  • Multiple Systems - Necessary Retrofits
    • Overview
    • Steering Gear Removal and Replace
    • Distributor Protective Cover
    • A/C Accumulator Protector
    • Speedometer Cable Replace
    • Accelerator Cable
    • Instrument Panel Reinforcement
    • Brake Pads and Proportioning Valves Replace
    • Splash Shield - A/C Compressor
  • A/C Compressor Oval O-Ring - Seal
  • A/C - System Description & Diagnostic Procedure
  • A/C - Compressor, New Sealing Washers
  • A/C Compressor Seal Washer - Reference Chart
  • A/C Compressor Clutch - Rattle
  • A/C - Compressor Clutch Inoperative
  • Heater Fan Switch/Wire Connector - Replacement
  • A/C - Odors On Hot/Humid Start Up
    • Overview
    • Afterblow Module Operation:
    • Afterblow Module Input/Output
    • After Module Circuit Diagrams:
    • Installation Precautions:
    • Testing the Afterblow Module:
  • A/C - Evaporator Core Freezes
  • Campaign - Air Conditioning Condenser
    • Overview
    • Vehicles Involves, Owner Notification, Dealer Campaign - Parts Information
    • Service Procedure, Campaign Label, Claim and Recording Completion Information
    • Owner Letter Information
  • A/C - Temperature Control Hard to Operate/Inoperative
  • Fuse Block - Deforms, Rewire A/C Blower Fuse 12
  • A/C - Refrigerant Loss Prevention
  • A/C Control Knobs - Fall Off
  • Contaminated R12 Refrigerant - Testing & Handling
  • A/C - R12 or R134a Service Recommendations
    • Overview
    • R12 Service Recommendations
    • R134A Service Recommendations
  • A/C - Retrofitting R-12 Vehicles to R-134A
  • Cooling System, A/C - Aluminum Heater Cores/Radiators