Heating, Ventilation and Air Conditioning for Chevrolet Chevrolet C-Series Medium Duty Truck C6/C7/C8 1998

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 Core Description
• Heater System Description
• Modes Description
• Ventilation Description

All Special Tools and Equipment

• Special Tools

All Visual Identification

• Heater Blower Controls Connector End Views

Diagnostic Procedures

• Air Delivery Improper
• Blower Motor Inoperative at Any Speed
• Blower Motor Inoperative at High Speed Only
• Blower Motor Inoperative at Low Speed Only
• Blower Motor Inoperative at Medium Speed
• Heat Excessive
• Heater Blower Controls System Check
• Heater Output Temperature Check
• High or Low Temperature Control Effort
• Noise Diagnosis

Electrical/Electronic Schematic Diagrams

• Heater Blower Controls Schematic References
• Heater Blower Controls Schematics

General Diagnostic Information

• Function Test
• Heating Insufficient

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 Relay Replacement
• Blower Motor Resistor Replacement
• Blower Switch Replacement
• Control Assembly Replacement
• Defroster Air Outlet Replacement
• Heater Core Replacement
• Heater Hoses Replacement
• Temperature Control Cable Replacement
• Vent Control Cables Replacement