GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
1998
🢒
Sonoma Pickup - 2WD
🢒
HVAC
🢒 HVAC Systems - Manual
HVAC
All Component Locator
HVAC Component Views
HVAC Components
All Description and Operation
Accumulator Description
Air Conditioning (A/C) System Description
Air Distribution System Description
Compressor Description
Condenser Description
Control Assembly Description
Evaporator Description
Expansion (Orifice) Tube Description
Handling of Refrigerant Lines and Fittings
Handling Refrigerant R-134a
Heater Core Description
Heater System Description
HVAC Air Delivery/Temperature Control Circuit Description
HVAC Blower Controls Circuit Description
HVAC Compressor Controls Circuit Description
Maintaining Chemical Stability
Refrigeration System Description
Relays and Sensors Description
Temperature Control Motor Circuit Description
All Special Tools and Equipment
Special Tools
All Visual Identification
HVAC Connector End Views
Cleaning, Inspection, and Adjustment
Compressor Leak Testing
Diagnostic Procedures
Blower Motor Always On
Blower Motor High Speed Inoperative
Blower Motor Inoperative at Any Speed
Blower Motor Inoperative Med-1
Blower Motor Inoperative Med-2
Blower Motor Low Speed Inoperative
Blower Motor Operates at High Speed Only
Cold Drafts on Floor
Defrosting Insufficient
Heating Insufficient
HVAC Blower Controls System Check
Noise Diagnosis
Temperature Control Inoperative
Disassembly, Overhaul, Repair, and Assembly
Air Conditioning Clutch Coil Installation
Air Conditioning Clutch Coil Removal
Clutch Rotor and Bearing Removal
Clutch Rotor and/or Bearing Install
Compressor Clutch Plate and Hub Assembly Removal
Compressor Clutch Plate/Hub Assembly Install
Compressor Control Switches Install
Compressor Control Switches Removal
Compressor Control Valve Assembly Install
Compressor Control Valve Assembly Removal
Compressor Pressure Relief Valve Installation
Compressor Pressure Relief Valve Removal
Compressor Shaft Seal Install
Compressor Shaft Seal Removal
Electrical/Electronic Schematic Diagrams
HVAC Air Delivery/Temperature Control Schematics
HVAC Blower Control Schematics
HVAC Compressor Control Schematics
HVAC Schematic Icons
HVAC Schematic References
General Diagnostic Information
CCOT Air Conditioning (A/C) System Diagnosis
Cooling Insufficient - Air Conditioning (A/C) Inoperative
Functional Check
Leak Testing
Odor Diagnosis
Refrigerant System Checks
System Performance Test
Vacuum System
Mechanical Specifications
Compressor Specifications
Fastener Tightening Specifications
Fitting and Line Tightening Specifications
Other Specifications
GM SPO Group Numbers
Refrigerant Oil Distribution Specifications
System Capacities
Removal, Installation, and Replacement
Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement
Air Conditioning Accumulator Replacement
Air Conditioning Compressor Hose Replacement
Air Conditioning Compressor Replacement
Air Conditioning Condenser Replacement
Air Conditioning Evaporator Core Replacement
Air Distributor Duct Replacement
Air Inlet Assembly Replacement
Blower Motor and Fan Replacement
Blower Motor Resistor Replacement
Compressor Relay Replacement
Compressor Sealing Washers Replacement
Control Assembly Replacement
Defroster Air Outlet Replacement
Defroster Valve Actuator Replacement
Evaporator and Accumulator Hose Assembly
Evaporator Tube Replacement
Floor Air Outlet Replacement
Heater Core Replacement
Lap Air Outlet Replacement
Mode Valve Actuator Replacement
O-Ring Replacement
Odor Correction
Refrigerant Recovery and Recharging
Temperature Actuator Replacement