GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy C Silverado - 2WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 HVAC Component Views
Figure 1:

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

HVAC Control Module
Object Number: 349763 Size: MF
(1)Instrument Panel
(2)HVAC Control Module
Figure 3:

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

HVAC Module Assembly
Object Number: 349759 Size: LF
(1)Recirculation Door Motor
(1)Recirculation Door Motor
(2)Mode Door
(2)Mode Door
(3)Mode Door Motor
(3)Mode Door Motor
(4)Temp Door Motor
(4)Temp Door Motor
(5)Blower Motor Resistor/Relay Assembly
(6)Blower Motor
Figure 5:

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 6:

A/C Compressor (4.3L)
Object Number: 310511 Size: MF
(1)A/C Compressor Electrical Connector
(2)A/C Compressor
(3)EGR Electrical Connector
(4)A/C Compressor High Pressure Cutout Switch
Figure 7:

A/C Compressor (4.8L, 5.3L, 6.0L)
Object Number: 310258 Size: LF
(1)A/C Compressor
(1)A/C Compressor
(2)A/C Compressor Electrical Connector
(3)A/C Compressor High Pressure Cutout Switch Connector
(3)A/C Compressor High Pressure Cutout Switch Connector
(4)A/C Compressor High Pressure Cutout Switch
(5)Engine Oil Level Switch
(6)Starter
(7)Crankshaft Position (CKP) Sensor
(8)Starter Solenoid Electrical Connector
Figure 8:

Auxiliary Battery Relay
Object Number: 349894 Size: MF
(1)Auxiliary Battery Relay
(2)A/C Accumulator
(3)A/C Compressor Low Pressure Cycling Switch
(4)Inner Wheel Well
(5)Engine 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