GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Component Views
Figure 1:

Forward Lamp Harness, Right Side
Object Number: 582030 Size: LF
(1)Rear Window Washer Fluid Pump
(2)S101
(3)Park/Turn Signal Lamp - RF
(4)Park/Turn Signal Lamp - RF Connector
(5)Marker Lamp - RF Connector
(6)Marker Lamp - RF
(7)S106
(8)S100
(9)Headlamp - Right - Sealed
(10)G100
(11)Blower Motor
(12)Windshield Washer Fluid Pump
(13)Blower Motor Resistor Assembly
Figure 2:

Engine Component Location View - Rear
Object Number: 781566 Size: LF
(1)A/C Compressor Clutch Connector
(2)Throttle Position (TP) Sensor Connector
(3)Idle Air Control (IAC) Valve Connector
(4)Central Sequential Fuel Injection (Central SFI) Connector
(5)Engine Oil Pressure (EOP) Sensor Connector
(6)S126
(7)Camshaft Position (CMP) Sensor Connector
(8)Knock Sensor (KS) Connector
(9)S134
(10)G106, And G107
(11)S124
(12)Engine Coolant Temperature (ECT) Sensor Connector
(13)A/C High Pressure Switch Connector
Figure 3:

Engine/Center of Front Dash Wiring
Object Number: 786790 Size: LF
(1)Cruise Control Module (CCM)
(2)Intake Air Temperature (IAT) Sensor Connector
(3)Windshield Wiper Motor and Module
(4)Intake Air Temperature (IAT) Sensor
(5)A/C Low Pressure Switch
(6)A/C Low Pressure Switch Connector
(7)Coolant Bypass Valve Solenoid
(8)Coolant Bypass Valve Solenoid Connector
(9)Mass Air Flow (MAF)Sensor
(10)Mass Air Flow (MAF) Sensor Connector
(11)Mass Air Flow (MAF) Sensor Connector
(12)Mass Air Flow (MAF) Sensor
(13)Intake Air Temperature (IAT) Sensor
(14)Intake Air Temperature (IAT) Sensor Connector
(15)Blower Motor
(16)S116
Figure 4:

IP Wiring, Right Side
Object Number: 786804 Size: LF
(1)S241
(2)S229
(3)S223
(4)S224
(5)S259
(6)S227
(7)S228
(8)Air Temperature Actuator Connector
(9)Air Temperature Actuator
Figure 5:

HVAC Panel Wiring
Object Number: 281316 Size: SF
(1)Temperature Switch (Part of HVAC Control Assembly)
(2)Mode Switch (Part of HVAC Control Assembly)
(3)HVAC Control Assembly
(4)Blower Motor Switch - Heater Auxiliary Connector
(5)Blower Motor Switch - Heater Auxiliary
(6)Blower Motor Switch - A/C Auxiliary
(7)Blower Motor Switch - A/C Auxiliary Connector
(8)Rear Window Wiper/Washer Switch
(9)Radio
(10)Instrument Panel Cluster (IPC)
(11)Rear Defogger Switch (Part of HVAC Control Assembly)
(12)Blower Switch (Part of HVAC Control Assembly)
Figure 6:

Rear Heater Wiring


Object Number: 374527 Size: LF
(1)G301
(2)Blower Motor Resistor - Heater Auxiliary Connector
(3)Blower Motor - Heater Auxiliary Ground Connector (C1)
(4)Blower Motor - Heater Auxiliary Power Connector (C2)
(5)Blower Motor - Heater Auxiliary
(6)Blower Motor Resistor - Heater Auxiliary
Figure 7:

A/C Wiring Rear
Object Number: 374534 Size: LF
(1)Blower Motor Resistor - A/C Auxiliary Connector
(2)Blower Motor Resistor - A/C Auxiliary
(3)G404
(4)Blower Motor - A/C Auxiliary
(5)Blower Motor - A/C Auxiliary Connector C1
(6)Blower Motor - A/C Auxiliary Connector C2