HVAC

All Component Locator

• HVAC Component Views
• HVAC Components

All Description and Operation

• Actuator Description
• Air Conditioning (A/C) Refrigerant Pressure Sensor Description
• Ambient Air Temperature Sensor Description
• Aspirator Description
• Control Assembly Description
• Control Assembly Description - Passenger
• Dual Zone Air Conditioning (A/C) System Description
• HVAC Air Delivery/Temperature Control Circuit Description
• HVAC Blower Controls Circuit Description
• HVAC Compressor Controls Circuit Description
• Inside Air Temperature Sensor Description
• Operating Modes
• Programmer Description
• Purge Mode Description
• Relays and Sensors Description
• Sun Load Temperature Sensor Description

All Special Tools and Equipment

• Special Tools

All Visual Identification

• HVAC Connector End Views

Diagnostic Procedures

• Afterblow Enabling
• Air Delivery Improper
• Blower Motor Does Not Operate Properly
• Control Head Changes by Itself
• Control Head Illumination/Display Does Not Operate Properly
• Cooling Insufficient - Air Conditioning (A/C) System
• Defrosting Insufficient
• Diagnostic Starting Point
• 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
• Passenger HVAC Control Does Not Operate Properly
• Set Temperature Requires Frequent Adjustment
• Steering Wheel Controls Inoperative
• Symptoms
• Temperature Variation Between Driver and Passenger Outlets
• Too Cool in Car
• Too Warm in Car

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 B0234 Air Mix Door #1 Range Error
• DTC B0237 Air Mix Door #1 Inoperative
• DTC B0249 Heater/Defrost/AC Door Range Error
• DTC B0252 Heater/Defrost/AC Door Inoperative Error
• DTC B0269 Air Inlet Door Range Error
• DTC B0272 Air Inlet Door Inoperative
• DTC B0279 Air Mix Door #2 Range Error
• DTC B0282 Air Mix Door #2 Inoperative
• DTC B0490 Passenger Temperature Control Cooler/Warmer Switch Circuit Range
• DTC B1000 ECU Malfunction
• DTC B2805 Steering Whl Controls HVAC Sw CKT 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
• Fault Detection
• Scan Tool Data Definitions
• Scan Tool Data List

Mechanical Specifications

• Fastener Tightening Specifications

Other Specifications

• GM SPO Group Numbers

Removal, Installation, and Replacement

• Air Inlet Actuator Replacement
• Air Mix Actuator Replacement - Driver
• Air Mix Actuator Replacement - Passenger
• Ambient Temperature Sensor Replacement
• Control Assembly Replacement
• Control Assembly Replacement - Passenger
• Heater Temperature Sensor Replacement
• Inside Air Temperature Sensor Aspirator Replacement
• Inside Air Temperature Sensor Replacement
• Mode Valve Actuator Replacement
• Panel Discharge Sensor Replacement - Left Side
• Panel Discharge Sensor Replacement - Right Side