GM Service Manual Online
For 1990-2009 cars only
Makes
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GMC_Truck
🢒
1998
🢒
Sonoma Pickup - 2WD
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HVAC
🢒 HVAC Systems - Automatic
HVAC
All Component Locator
HVAC Component Views
HVAC Components
All Description and Operation
Actuator Description
Ambient Air Temperature Sensor Description
Blower Motor Pulse Width Module Description
Heater Core Description
HVAC Blower 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
Cleaning, Inspection, and Adjustment
Compressor Leak Testing
Diagnostic Procedures
Air Delivery Improper
Blower Has High Speed Only
Blower Motor Inoperative at Any Speed
Cold Drafts on Floor
Defrosting Insufficient
Diagnostic Trouble Code (DTC) Clearing
Diagnostic Trouble Code (DTC) Displaying
Heating Insufficient
HVAC System Check
Diagnostic Trouble Codes
DTC B0160 Outside Air Temp Sensor Circuit Low
DTC B0161 Outside Air Temp Sensor Circuit High
DTC B0165 Pass Compart Temp Sensor 1 Circuit Low
DTC B0166 Pass Compart Temp Sensor 1 Circuit High
DTC B0175 Output Air Temp Sensor 1 Circuit Low
DTC B0176 Output Air Temp Sensor 1 Circuit High
DTC B0180 Output Air Temp Sensor 2 Circuit Low
DTC B0181 Output Air Temp Sensor 2 Circuit High
DTC B0185 Solar Load Sensor 1 Circuit Low
DTC B0186 Solar Load Sensor 1 Circuit High
DTC B0408 Temperature Control #1 (Main/Front) Circuit Malfunction
DTC B0415 Temp Control Circuit 1 Low
DTC B0416 Temp Control Circuit 1 High
DTC Table
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 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
Diagnostic System Check
Functional Check
Leak Testing
Re-Calibrating Actuators After Power Loss
Refrigerant System Checks
Scan Tool Data Definitions
Scan Tool Data List
Scan Tool Diagnostics
Sensor Resistance Table
System Performance Test
VDOT Air Conditioning (A/C) System Diagnosis
Mechanical Specifications
Fastener Tightening Specifications
Other Specifications
GM SPO Group Numbers
Refrigerant Oil Distribution Specifications
System Capacities
Removal, Installation, and Replacement
Air Conditioning (A/C) High Pressure Cut-Out Switch 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
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
Inside Air Temperature Sensor Replacement
Mode Valve Actuator Replacement
O-Ring Replacement
Odor Correction
Pressure Cycling Switch Replacement
Refrigerant Recovery and Recharging
Temperature Actuator Replacement
Vacuum Electrical Solenoid Replacement