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 - Delayed Cooling After Engine Start Up
  • A/C - Compressor Moan/Vibration
  • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
  • 89T80B1D Adds Information to TSB 89T80A1D - 05/01/1990
  • Cooling Fan - Runs Battery Dead Diagnosis
  • A/C - Pipe Leak From A/T Shift Cable Contact
• By Symptom
  • Abnormal wear/deterioration
    • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
    • A/C - Pipe Leak From A/T Shift Cable Contact
  • Continuous fan operation
    • Cooling Fan - Runs Battery Dead Diagnosis
  • Customer Interest
    • Body - Broken Rear Window Defogger Grid Detection
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Delayed Cooling After Engine Start Up
    • A/C - Compressor Moan/Vibration
    • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
    • 89T80B1D Adds Information to TSB 89T80A1D - 05/01/1990
    • Cooling Fan - Runs Battery Dead Diagnosis
    • A/C - Pipe Leak From A/T Shift Cable Contact
  • Erratic Operation
    • A/C - Delayed Cooling After Engine Start Up
  • Leaks
    • A/C - Pipe Leak From A/T Shift Cable Contact
  • Loose
    • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
  • Low, Dead battery
    • Cooling Fan - Runs Battery Dead Diagnosis
  • Noise
    • A/C - Compressor Moan/Vibration
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
  • Poor performance
    • A/C - Pipe Leak From A/T Shift Cable Contact
  • Vibration
    • A/C - Compressor Moan/Vibration
    • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
  • Won't turn off
    • Cooling Fan - Runs Battery Dead Diagnosis
• 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 - 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 - Delayed Cooling After Engine Start Up
  • A/C Refrigerant - Contamination
  • A/C - CFC Reduction and Refrigerant Recovery/Recycling
  • A/C - Neoprene O-Ring Usage Chart
    • Overview
    • Air Conditioning Service
  • A/C - Leak Test
  • A/C - Compressor Moan/Vibration
  • A/C - Broken Pipes Due to Loose/Missing Mounting Bolts
  • A/C Compressor - Interferes With Water Pump Bracket
  • A/C Compressor - Interferes with Water Pump Bracket
  • A/C Compressor Seal Washer - Reference Chart
  • 89T80B1D Adds Information to TSB 89T80A1D - 05/01/1990
  • Cooling Fan - Runs Battery Dead Diagnosis
  • A/C - Pipe Leak From A/T Shift Cable Contact
  • A/C - Use of Alternate Refrigerants Other Than R-12
  • Contaminated R12 Refrigerant - Testing & Handling
  • A/C - Retrofitting R-12 Vehicles to R-134A
  • Cooling System, A/C - Aluminum Heater Cores/Radiators