HVAC

All Component Locator

• Heater Blower Controls Component Views
• Heater Blower Controls Components

All Description and Operation

• Air Distribution System Description
• Heater Blower Controls Circuit Description
• Heater System Description
• Modes Description
• Ventilation Description

All Visual Identification

• Heater Blower Controls Connector End Views

Diagnostic Procedures

• Air Delivery Improper
• Blower Motor Always On
• Blower Motor Inoperative at Any Speed
• Blower Motor Inoperative at High Speed Only
• Blower Motor Inoperative at Low Speed Only
• Blower Motor Inoperative Med-1
• Blower Motor Inoperative Med-2
• Blower Motor Operates at High Speed Only
• Defrosting Insufficient
• Heat Excessive
• Heater Blower Controls System Check
• Heater Output Temperature Check
• Heating Insufficient
• Noise Diagnosis

Electrical/Electronic Schematic Diagrams

• Heater Blower Controls Schematic References
• Heater Blower Controls Schematics

General Diagnostic Information

• Function Test

Mechanical Specifications

• Fastener Tightening Specifications

Other Specifications

• GM SPO Group Numbers

Removal, Installation, and Replacement

• Air Distributor Duct Replacement
• Air Inlet Assembly Replacement
• Blower Motor and Fan Replacement
• Blower Motor Resistor Replacement
• Control Assembly Replacement
• Defroster Valve Replacement
• Floor Air Outlet Replacement
• Heater Core Replacement
• Heater Hoses Replacement
• Heater/Vent Module Replacement
• Mode Valve Replacement
• Temperature Valve Replacement
• Vacuum Tank Replacement