Heating and Air Conditioning: Technical Service Bulletins

• Customer Interest
  • Body - Broken Rear Window Defogger Grid Detection
  • A/C - Musty Odors Emitted From (HVAC) System
  • A/C - Little or No Heat
  • A/C - Insufficient Heat on Driver's Side
  • A/C - Odor
  • A/C Compressor Discharge Pipe - Broken
  • A/C Compressor - Repetitively Inoperative
  • A/C Compressor - Repititive Failures
  • A/C Compressor - Reat Failures
  • A/C - Insufficient Heater Air/Hot Air Blowing On Face
  • Heater - Warm Air Blows Into Driver's Face
  • 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 - Emitting Odors
  • Drive Belt - Chirp or Squeal
  • Heater Air Conditioning Unit - Whistling Noise
• By Symptom
  • Abnormal wear/deterioration
    • A/C Compressor Discharge Pipe - Broken
    • Seized A/C Compressor Service
    • Cooling Fan - Runs Battery Dead
  • Customer Interest
    • Body - Broken Rear Window Defogger Grid Detection
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Little or No Heat
    • A/C - Insufficient Heat on Driver's Side
    • A/C - Odor
    • A/C Compressor Discharge Pipe - Broken
    • A/C Compressor - Repetitively Inoperative
    • A/C Compressor - Repititive Failures
    • A/C Compressor - Reat Failures
    • A/C - Insufficient Heater Air/Hot Air Blowing On Face
    • Heater - Warm Air Blows Into Driver's Face
    • 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 - Emitting Odors
    • Drive Belt - Chirp or Squeal
    • Heater Air Conditioning Unit - Whistling Noise
  • Erratic Operation
    • Heater - Warm Air Blows Into Driver's Face
    • Cooling Fan - Runs Battery Dead
  • Inoperative
    • A/C Compressor Discharge Pipe - Broken
    • A/C Compressor - Repetitively Inoperative
    • A/C Compressor - Repititive Failures
    • A/C Compressor - Reat Failures
  • Leaks
    • A/C Compressor Discharge Pipe - Broken
  • Low, Dead battery
    • Cooling Fan - Runs Battery Dead
  • Noise
    • Drive Belt - Chirp or Squeal
    • Heater Air Conditioning Unit - Whistling Noise
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Odor
    • A/C - Emitting Odors
  • Poor performance
    • A/C - Little or No Heat
    • A/C - Insufficient Heat on Driver's Side
    • A/C - Insufficient Heater Air/Hot Air Blowing On Face
    • Heater - Warm Air Blows Into Driver's Face
  • 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:
• 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 - 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 - Little or No Heat
  • A/C - Insufficient Heat on Driver's Side
  • 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
  • A/C - Compressor Lines Reversed During Service Repairs
  • A/C Compressor Discharge Pipe - Broken
  • A/C - System Description & Diagnostic Procedure
  • Seized A/C Compressor Service
  • A/C Compressor - Repetitively Inoperative
  • A/C Compressor - Repititive Failures
  • A/C Compressor - Reat Failures
  • A/C Compressor Seal Washer - Reference Chart
  • A/C - Insufficient Heater Air/Hot Air Blowing On Face
  • Heater - Warm Air Blows Into Driver's Face
  • HVAC Blower Motor - Revised Replacement Parts
  • Air Conditioning Orifice Tube - Location
  • 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 - Emitting Odors
  • A/C - Refrigerant Loss Prevention
  • Cooling Fan - Runs Battery Dead
  • Drive Belt - Chirp or Squeal
  • Contaminated R12 Refrigerant - Testing & Handling
  • A/C - Retrofitting R-12 Vehicles to R-134A
  • Heater Air Conditioning Unit - Whistling Noise
  • Cooling System, A/C - Aluminum Heater Cores/Radiators