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 - Cold Air Leaking On Passenger Foot Area
  • A/C System - Flushing With Refrigerant 11
    • Overview
    • Air Conditioning System Flushing Procedure
      • Overview
      • A.Flush Condenser (On Car) -
      • B.Flush Evaporator (On Car) -
      • C.Flush Discharge/Suction Hose Set and Liquid Lines/Hoses (Off Car) -
      • D.Accumulator (Off Car) -
      • E.Compressor (Off Car) -
  • A/C Compressor - Erratic Operation
  • A/C - Unwanted High Blower Operation With Key Off
  • P/S - Noises From P/S Cylinder Line Contacting HVAC Case
• By Symptom
  • 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 - Cold Air Leaking On Passenger Foot Area
    • A/C System - Flushing With Refrigerant 11
      • Overview
      • Air Conditioning System Flushing Procedure
        • Overview
        • A.Flush Condenser (On Car) -
        • B.Flush Evaporator (On Car) -
        • C.Flush Discharge/Suction Hose Set and Liquid Lines/Hoses (Off Car) -
        • D.Accumulator (Off Car) -
        • E.Compressor (Off Car) -
    • A/C Compressor - Erratic Operation
    • A/C - Unwanted High Blower Operation With Key Off
    • P/S - Noises From P/S Cylinder Line Contacting HVAC Case
  • Erratic Operation
    • A/C Compressor - Erratic Operation
  • Inoperative
    • A/C System - Flushing With Refrigerant 11
      • Overview
      • Air Conditioning System Flushing Procedure
        • Overview
        • A.Flush Condenser (On Car) -
        • B.Flush Evaporator (On Car) -
        • C.Flush Discharge/Suction Hose Set and Liquid Lines/Hoses (Off Car) -
        • D.Accumulator (Off Car) -
        • E.Compressor (Off Car) -
  • Leaks
    • A/C - Cold Air Leaking On Passenger Foot Area
    • A/C - Leak Test
      • Overview
      • General Description
      • Leak Testing the Refrigeration System
        • Overview
        • Electric Halogen Leak Detector
        • Fluorescent Leak Detector
        • Liquid Leak Detectors and Pressure Testing
    • A/C - Refrigerant Loss Due to Loose or Missing Fitting
  • Loose
    • A/C - Refrigerant Loss Due to Loose or Missing Fitting
  • Noise
    • Instrument Panel - Rattle or Buzzing Noise From Center
    • P/S - Noises From P/S Cylinder Line Contacting HVAC Case
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
  • Poor performance
    • A/C - Delayed Cooling After Engine Start Up
    • A/C - Refrigerant Loss Due to Loose or Missing Fitting
  • Won't turn off
    • A/C - Unwanted High Blower Operation With Key Off
• 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
  • Vehicle - Technical Service Bulletin Updates
  • 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
  • Instrument Panel - Rattle or Buzzing Noise From Center
  • Electrical - Wire Probing Device
  • A/C - Info. On the Use of Alternate Refrigerants CFC-12
  • A/C - Delayed Cooling After Engine Start Up
  • A/C Refrigerant - Contamination
  • A/C - Cold Air Leaking On Passenger Foot Area
  • A/C - Charging Capacity Chart
  • A/C System - Flushing With Refrigerant 11
    • Overview
    • Air Conditioning System Flushing Procedure
      • Overview
      • A.Flush Condenser (On Car) -
      • B.Flush Evaporator (On Car) -
      • C.Flush Discharge/Suction Hose Set and Liquid Lines/Hoses (Off Car) -
      • D.Accumulator (Off Car) -
      • E.Compressor (Off Car) -
  • A/C - Leak Test
    • Overview
    • General Description
    • Leak Testing the Refrigeration System
      • Overview
      • Electric Halogen Leak Detector
      • Fluorescent Leak Detector
      • Liquid Leak Detectors and Pressure Testing
  • A/C - Refrigerant (R-134A) Information
  • A/C Compressor - Erratic Operation
  • A/C - Compressor (V-5) Diagnosis
    • Overview
    • A.Observe All Safety Precautions:
    • B.Visual Inspection: Engine Off
    • C.Check System Refrigerant Charge: Engine Off
    • D.Check Electrical System For Clutch Engagement: Engine At Idle
    • E.Check Refrigerant System Performance: Engine Off
    • F.Diagnosis and Service Procedures:
  • A/C Compressor Seal Washer - Reference Chart
  • A/C - Blower Motor Replacement Part
  • A/C - Unwanted High Blower Operation With Key Off
  • A/T - Refrigerant Schrader Valve Replacement
  • A/C - Refrigerant Loss From Schrader Valve Caps
  • A/C - Refrigerant Loss Due to Loose or Missing Fitting
  • P/S - Noises From P/S Cylinder Line Contacting HVAC Case
  • Contaminated R12 Refrigerant - Testing & Handling
  • A/C - Retrofitting R-12 Vehicles to R-134A
  • Cooling System, A/C - Aluminum Heater Cores/Radiators