GM Service Manual Online
For 1990-2009 cars only
Figure 1:

HVAC Module Components


Object Number: 391386  Size: MF
(1)Heater Core Cover
(2)Heater Core
(3)A/C Defroster Seal
(4)Upper HVAC Module Case
(5)Dash Seal
(6)A/C Valve
(7)Heater/Defroster Valve
(8)Temperature Valve
(9)A/C Valve Lever
(10)Mode Valve Actuator
(11)Heater/Defroster Valve Lever
(12)Mode Valve Cam
(13)Lower HVAC Module Case
(14)Rear Heater Duct Seal
(15)Temperature Valve Actuator Screw
(16)Temperature Valve Actuator
(17)HVAC Module Wiring Harness
(18)Blower Motor Resistor/Relay Assembly
(19)Blower Motor Acoustic Insulator
(20)Blower Motor
(21)Blower Motor Fan
(22)Passenger Compartment Air Filter Access Door
(23)Dash Seal
(24)Evaporator Block Seal
(25)Evaporator Core
(26)Passenger Compartment Air Filters
(27)Air Inlet Valve
(28)Air Inlet Housing
(29)Air Inlet Housing Seal
(30)Air Inlet Actuator
(31)Heater Core Pipe Seal
Figure 2:

HVAC Module Assembly Components


Object Number: 349759  Size: LF
(1)Recirculation Actuator
(1)Recirculation Actuator
(2)Mode Actuator Door
(2)Mode Actuator Door
(3)Mode Actuator
(3)Mode Actuator
(4)Air Temperature Actuator
(4)Air Temperature Actuator
(5)Blower Motor Resistor Assembly
(6)Blower Motor
Figure 3:

HVAC Module Assembly (Connections)


Object Number: 310004  Size: MF
(1)Recirculation Actuator Electrical Connector
(2)Instrument Panel
(3)Electrical Harness Connector
(4)Ground 200 (G200)
(5)Blower Motor Resistor Assembly
(6)Blower Motor Resistor Electrical Connector
(7)Harness Inline Connector (C296)
(8)Air Temperature Actuator Electrical Connector
(9)Air Temperature Actuator
(10)Mode Actuator
Figure 4:

A/C High Pressure Recirculating Switch


Object Number: 310810  Size: MF
(1)Radiator Core Support
(2)A/C Compressor and Condenser Hose
(3)Headlamp Support
(4)A/C High Pressure Recirculating Switch
(5)A/C High Pressure Recirculating Switch Electrical Connector
Figure 5:

Auxiliary Battery Relay


Object Number: 349894  Size: MF
(1)Auxiliary Battery Relay
(2)A/C Accumulator
(3)A/C Low Pressure Switch
(4)Inner Wheel Well
(5)Coolant Level Switch Electrical Connector
(6)Mass Air Flow (MAF) Sensor
(7)Air Cleaner Assembly
(8)Engine Coolant Recovery Reservoir
(9)Auxiliary Battery Relay Electrical Connector
Figure 6:

A/C Compressor Clutch (4.8L, 5.3L, 6.0L)


Object Number: 310258  Size: LF
(1)A/C Compressor Clutch
(1)A/C Compressor Clutch
(2)A/C Compressor Clutch Electrical Connector
(3)A/C High Pressure Switch Connector
(3)A/C High Pressure Switch Connector
(4)A/C High Pressure Switch
(5)Engine Oil Level Switch
(6)Starter
(7)Crankshaft Position (CKP) Sensor
(8)Starter Solenoid Electrical Connector
Figure 7:

HVAC Control Assembly-Front Auxiliary (Blower Control)


Object Number: 623155  Size: MF
(1)HVAC Control Assembly-Front Auxiliary
(2)HVAC Control Assembly-Front Auxiliary Connector
Figure 8:

HVAC Control Assembly-Front Auxiliary


Object Number: 623158  Size: MF
(1)Overhead Console
(2)HVAC Control Assembly-Front Auxiliary
(3)HVAC Control Assembly-Front Auxiliary Connector
(4)Headliner