HVAC

All Component Locator

• HVAC Component Views
• HVAC Components

All Description and Operation

• Actuator Description
• Air Delivery Description and Operation
• Air Temperature Description and Operation
• Ambient Air Temperature Sensor Description
• HVAC Air Delivery/Temperature Control Circuit Description
• HVAC Blower Controls Circuit Description
• HVAC Compressor Controls Circuit Description
• Inside Air Temperature Sensor Description
• Purge Mode Description
• Sun Load Temperature Sensor Description

All Special Tools and Equipment

• Special Tools

All Visual Identification

• HVAC Connector End Views

Diagnostic Procedures

• Blower Motor Inoperative in Auto Mode
• Defrosting Insufficient
• Diagnostic Starting Point
• Diagnostic System Check
• Heating Insufficient
• HVAC Compressor Clutch Does Not Disengage
• HVAC Compressor Clutch Does Not Engage
• Symptoms

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 B0229 Air Flow Control #7 (Recirc) Feedback Circuit Range/Performance
• DTC B0248 Mode Door Inoperative Error
• DTC B0268 Air Flow Control #7 (Recirc) Circuit Malfunction
• DTC B0408 Temperature Control #1 (Main/Front) Circuit Malfunction
• DTC B0414 Temperature Control #1 (Main/Front) Feedback Circuit Range/Performance
• DTC B0429 Air Mix Door #3 Range Error
• DTC B0434 Temperature Control #3 Rear Feedback Circuit Range
• DTC B1000 ECU Malfunction
• DTC B1020 Auxiliary ECU Malfunction
• DTC B3531 Air Flow Control #10 Rear Circuit Malfunction
• DTC B3579 Output Air Temperature Sensor #6 Circuit Range/Performance
• DTC B3584 Output Air Temperature Sensor #7 Circuit Range/Performance
• DTC B3761 Air Flow Control #3 (Blend Defog/Floor) Feedback Circuit Range/Performance
• DTC B3764 Airflow Control #4 Mode Feedback Circuit Malfunction
• DTC Table
• DTC U1500 Communication (Front to Rear) State of Health

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

• Functional Check
• Re-Calibrating Actuators After Power Loss
• Scan Tool Data Definitions
• Scan Tool Data List
• Scan Tool Diagnostics
• System Performance Test

Mechanical Specifications

• Fastener Tightening Specifications

Other Specifications

• GM SPO Group Numbers

Removal, Installation, and Replacement

• Air Conditioning (A/C) Temperature Sensor Replacement
• Ambient Temperature Sensor Replacement
• Control Assembly Replacement
• Control Assembly Replacement - Auxiliary
• Heater Temperature Sensor Replacement
• Mode Valve Actuator Replacement
• Odor Correction
• Refrigerant Recovery and Recharging
• Sun Load Temperature Sensor Replacement