HVAC

All Component Locator

• HVAC Component Views
• HVAC Components

All Description and Operation

• Air Delivery Description and Operation
• Air Temperature Description and Operation

All Special Tools and Equipment

• Special Tools

All Visual Identification

• HVAC Connector End Views

Diagnostic Procedures

• Actuator Recalibration
• Afterblow Enabling
• Air Delivery Improper
• Air Delivery Improper - Auxiliary
• Air Recirculation Malfunction
• Auxiliary Blower Motor Always On
• Auxiliary Blower Motor Inoperative
• Auxiliary Blower Motor Malfunction
• Blower Motor Always On
• Blower Motor Inoperative
• Blower Motor Malfunction
• Control Head Changes by Itself
• Control Head Illumination/Display Does Not Operate Properly
• Diagnostic Starting Point
• Diagnostic Trouble Code (DTC) Clearing
• Diagnostic Trouble Code (DTC) Displaying
• HVAC Compressor Clutch Does Not Disengage
• HVAC Compressor Clutch Does Not Engage
• Improper Control Response
• Instrument Panel Module Recalibration
• Outside Air Temperature Display Inaccurate or Inoperative
• Set Temperature Requires Frequent Adjustment
• Steering Wheel Controls Inoperative
• Symptoms
• Temperature Variation Between Driver and Passenger Outlets
• Too Cold in Vehicle
• Too Cold in Vehicle - Auxiliary
• Too Hot in Vehicle
• Too Hot in Vehicle - Auxiliary

Diagnostic Trouble Codes

• DTC B0159 Outside Air Temperature Sensor Circuit Range/Performance
• DTC B0164 Passenger Compartment Temperature Sensor #1 (Single Sensor or LH) Circuit Range/Performance
• DTC B0174 Output Air Temperature Sensor #1 (Upper; Single or LH) Circuit Range/Performance
• DTC B0179 Output Air Temperature Sensor #2 (Lower; Single or LH) Circuit Range/Performance
• DTC B0184 Solar Load Sensor #1 CKT Range
• DTC B0189 Solar Load Sensor #2 CKT Range
• DTC B0248 Mode Door Inoperative Error
• DTC B0249 Heater/Defrost/AC Door Range Error
• DTC B0268 A/I Door Inoperative Error
• DTC B0269 Air Inlet Door Range Error
• DTC B0408 Temperature Control #1 (Main/Front) Circuit Malfunction
• DTC B0409 Air Mix Door #1 Range Error
• DTC B0419 Air Mix Door #2 Range Error
• DTC B0423 Air Mix Door #2 Inoperative Error
• DTC B0428 Air Mix Door #3 Inoperative Error
• DTC B0429 Temperature Control #3 Rear Circuit Range/Performance
• DTC B0510 RH Panel Discharge Temp Sensor Failure
• DTC B0515 RH Heater Discharge Temp Sensor Failure
• DTC B0520 Rear Discharge Temp Sensor Failure
• DTC B1009 EEPROM Checksum Error
• DTC B2805 Steering Whl Controls HVAC Sw CKT Malf
• DTC P1531 A/C Temperature Sensor Circuit Malf
• DTC P1536 Engine Coolant Overtemperature - Air Conditioning (A/C) Disabled
• DTC P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled
• DTC Table

Electrical/Electronic Schematic Diagrams

• HVAC Air Delivery/Temperature Control Schematics
• HVAC Blower Control Schematics
• HVAC Compressor Control Schematics
• HVAC Schematic Icons

Electrical/Electronic Specifications

• Sensor Resistance Table

General Diagnostic Information

• Diagnostic System Check
• Scan Tool Data Definitions
• Scan Tool Data List

Mechanical Specifications

• Fastener Tightening Specifications

Other Specifications

• GM SPO Group Numbers

Removal, Installation, and Replacement

• Air Conditioning (A/C) Temperature Sensor Replacement
• Air Inlet Actuator Replacement
• Air Mix Actuator Replacement - Driver
• Air Mix Actuator Replacement - Passenger
• Ambient Temperature Sensor Replacement
• Auxiliary Mode Valve Actuator Replacement
• Blower Motor Control Module Replacement
• Control Assembly Replacement - Rear
• Heater Temperature Sensor Replacement
• Inside Air Temperature Sensor Replacement
• Mode Valve Actuator Replacement
• Sun Load Temperature Sensor Replacement
• Temperature Sensor Replacement - Rear