GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Riviera 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 HVAC Component Views
Figure 1:

Right Front of the Engine
Object Number: 342502 Size: MF
(1)A/C Diode
(2)S105, S108
(3)A/C High Pressure Switch
(4)A/C Clutch
(5)A/C Pressure Sensor
Figure 2:

Right Front of the Engine Compartment
Object Number: 342470 Size: MF
(1)A/C High Temperature Sensor
Figure 3:

Center Rear of the Engine Compartment
Object Number: 342498 Size: LF
(1)A/C Low Temperature Sensor
(2)S140
(3)Right Front Strut Tower
Figure 4:

Right Front of the Vehicle
Object Number: 342468 Size: MF
(1)Right Horn (Left Similar)
Figure 5:

Center Front of the Vehicle
Object Number: 342442 Size: MF
(1)Ambient Air Temperature Sensor
Figure 6:

Engine Compartment, in the Right Front Corner
Object Number: 342478 Size: LF
(1)A/C Low Pressure Switch
Figure 7:

Passenger Compartment, Behind the Instrument Panel
Object Number: 342704 Size: LF
(1)S264
(2)S256
(3)Headlamp Switch Connector
(4)C213
(5)C200
(6)C203
(7)Radio Connector
(8)C206
(9)S201
(10)S273
(11)IP Compartment
(12)C210
(13)Heater and A/C Control Connector
(14)S204
Figure 8:

Passenger Compartment, Top of the Instrument Panel
Object Number: 342709 Size: LF
(1)Right Solar Sensor (Buick)
(2)Ambient Light Sensor (Oldsmobile)
(3)Right Solar Sensor (Oldsmobile)
(4)S288
(5)C219 (Oldsmobile)
(6)Defrost Grille (Oldsmobile)
(7)Left Solar Sensor (Oldsmobile)
(8)Left Solar Sensor (Buick)
(9)Defrost Grille (Buick)
(10)Ambient Light Sensor (Buick)
Figure 9:

Left Side of the Instrument Panel
Object Number: 342733 Size: MF
(1)Inside Air Temperature Sensor
(2)Inside Air Temperature Sensor
(2)Inside Air Temperature Sensor
Figure 10:

Passenger Compartment, Under the Right Side of the IP
Object Number: 342750 Size: LF
(1)Heater and A/C Programmer
(2)Variable Steering Module
(3)Blower Motor