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 - Eliminate Odors & Mold Growth
  • A/C - Insufficient Warm Air to Driver Side
  • A/C - Reduced Performance During Idle/Slow Speeds
  • A/C - Odors at Start Up in Hot Humid Climates
    • Overview
    • Required Equipment
    • Procedure:
  • A/C - Compressor Lines Reversed During Service
  • A/C - Compressor Noise
  • Air Conditioning - Moan and Vibration
  • Engine - A/C Belt Noise, Check Tension
  • A/C - Moan Noise Off Idle
  • A/C - Blower Deep Roar After Start Up In Cold Weather
  • A/C - Lack of Heating Performance
  • Climate Control - Excessive Heating
  • A/C - Buzz Noise From Center Dash Outlets
• By Symptom
  • Customer Interest
    • Body - Broken Rear Window Defogger Grid Detection
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Eliminate Odors & Mold Growth
    • A/C - Insufficient Warm Air to Driver Side
    • A/C - Reduced Performance During Idle/Slow Speeds
    • A/C - Odors at Start Up in Hot Humid Climates
      • Overview
      • Required Equipment
      • Procedure:
    • A/C - Compressor Lines Reversed During Service
    • A/C - Compressor Noise
    • Air Conditioning - Moan and Vibration
    • Engine - A/C Belt Noise, Check Tension
    • A/C - Moan Noise Off Idle
    • A/C - Blower Deep Roar After Start Up In Cold Weather
    • A/C - Lack of Heating Performance
    • Climate Control - Excessive Heating
    • A/C - Buzz Noise From Center Dash Outlets
  • Erratic Operation
    • A/C - Reduced Performance During Idle/Slow Speeds
    • Climate Control - Excessive Heating
  • Leaks
    • A/C - Leak Test
  • Loose
    • A/C System - Refrigerant Loss Prevention
  • Noise
    • A/C - Compressor Noise
    • Air Conditioning - Moan and Vibration
    • Engine - A/C Belt Noise, Check Tension
    • A/C - Moan Noise Off Idle
    • A/C - Blower Deep Roar After Start Up In Cold Weather
    • A/C - Buzz Noise From Center Dash Outlets
  • Odors
    • A/C - Musty Odors Emitted From (HVAC) System
    • A/C - Eliminate Odors & Mold Growth
    • A/C - Odors at Start Up in Hot Humid Climates
      • Overview
      • Required Equipment
      • Procedure:
  • Poor performance
    • A/C - Insufficient Warm Air to Driver Side
    • A/C - Reduced Performance During Idle/Slow Speeds
    • A/C - Won't Cool, Replace Switch & Add Heat Shield
    • A/C - Lack of Heating Performance
  • Vibration
    • Air Conditioning - Moan and Vibration
• 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 - 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 - Eliminate Odors & Mold Growth
  • A/C - Insufficient Warm Air to Driver Side
  • A/C - Reduced Performance During Idle/Slow Speeds
  • A/C - Won't Cool, Replace Switch & Add Heat Shield
  • A/C Refrigerant - Contamination
  • A/C - CFC Reduction & Refrigerant Recovery/Recycling
  • A/C - R134A Refrigerant Information
  • A/C - Odors at Start Up in Hot Humid Climates
    • Overview
    • Required Equipment
    • Procedure:
  • A/C - Leak Test
  • A/C - Compressor Lines Reversed During Service
  • A/C - Compressor Noise
  • A/C Compressor (DA6) - Replacements Availability
  • A/C - System Description & Diagnostic Procedure
  • A/C Compressor Shaft Nut - Removal (Discontinued)
  • A/C Compressor Seal Washer - Reference Chart
  • Air Conditioning - Moan and Vibration
  • Engine - A/C Belt Noise, Check Tension
  • A/C - Moan Noise Off Idle
  • A/C - Blower Deep Roar After Start Up In Cold Weather
  • A/C - O-Ring Replacement & Updated Torque
  • A/C - Lack of Heating Performance
  • Climate Control - Excessive Heating
  • A/C System - Refrigerant Loss Prevention
  • A/C - Buzz Noise From Center Dash Outlets
  • A/C - Electronic Touch Climate Control Assembly
  • Contaminated R12 Refrigerant - Testing & Handling
  • A/C - Retrofitting R-12 Vehicles to R-134A
  • A/C - Information On the Use of Alternate Refrigerants
  • Cooling System, A/C - Aluminum Heater Cores/Radiators