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

Body Relay Block Relays


Object Number: 238121  Size: LF
(1)Park Lamp Relay
(2)Courtesy Lamp Relay
(3)Retained Accessory Power Relay
(4)Power Seats Circuit Breaker
(5)Power Windows Circuit Breaker
(6)Inadvertent Power Relay
(7)Door Lock Relay
(8)Headlamp Ground Relay
(9)Driver Door Unlock Relay
(10)Door Unlock Relay
Figure 2:

Dome and High Mounted Stop Lamp (Pickup)


Object Number: 357177  Size: LF
(1)Dome and High Mounted Stop Lamp
Figure 3:

Dome Lamp Harness (Regular Cab Pickup)


Object Number: 357172  Size: LF
(1)S302
(2)Dome Lamp Harness
(3)Dome and High Mounted Stop Lamp
(4)S300
(5)Sunshade Mirror Lamp, LH
(6)C209
(7)Inside Rear View Mirror
(8)Sunshade Mirror Lamp, RH
Figure 4:

DRL Diode (CKT 992 and CKT 592)


Object Number: 357886  Size: LF
Figure 5:

DRL Relay


Object Number: 400500  Size: LF
Figure 6:

FOG LP Relay


Object Number: 357890  Size: LF
Figure 7:

HDLP GND Relay


Object Number: 357888  Size: LF
Figure 8:

HDLP PWR Relay


Object Number: 357889  Size: LF
Figure 9:

Headlamps


Object Number: 357145  Size: MF
(1)Headlamp Switch
(2)IP Dimmer Switch
(3)Fog Lamp Switch
(4)Dome Lamp Override Switch
Figure 10:

Instrument Panel, RF


Object Number: 357161  Size: LF
(1)C102
(2)C203
(3)Instrument Panel (IP)
(4)Recirculation Door Motor
(5)Turn Signal Lamp 2/4 Flasher
(6)C601
(7)C600
(8)Transfer Case Shift Control Module Connector
(9)Splice Pack SP200
(10)Splice Pack SP204
(11)G203, G204 and G205
(12)HVAC Solenoid Assembly Connector (w/ Auto A/C)
(13)Air Temperature Valve Sensor and Motor
Figure 11:

IP Wiring Harness


Object Number: 357160  Size: LF
(1)Supplemental Restraint System (SRS) IP Module
(2)C201
(3)IP Compartment Lamp
(4)Door Jamb Switch, RH Front
Figure 12:

License Lamp Wiring (Fleetside Pickup)


Object Number: 357374  Size: LF
(1)Rear License Plate Lamp Bulb, RH
(2)Rear License Plate Lamp, RH
(3)Rear License Plate Lamp Bulb, LH
(4)Rear License Plate Lamp, LH
Figure 13:

License Lamp Wiring (Sportside Pickup)


Object Number: 357377  Size: LF
(1)Rear License Plate Lamp
(2)C430
Figure 14:

Manual Transmission (2.2 L)


Object Number: 357136  Size: LF
(1)Vehicle Speed Sensor
(2)Backup Lamp Switch
(2)Backup Lamp Switch
(3)Heated Oxygen Sensor (HO2S, Bank 1, Sensor 1)
(4)C117
Figure 15:

Rear Lamps (Pickup)


Object Number: 357373  Size: LF
(1)Side Marker Lamp, RH Rear
(2)Park and Turn Signal Lamp, RH Rear
(3)Backup Lamp, RH
(4)Splice Pack SP400
(5)Backup Lamp, LH
(6)Side Marker Lamp, LH Rear
(7)Park and Turn Signal Lamp, LH Rear
Figure 16:

IP Harness, Underhood Lamp


Object Number: 357127  Size: LF
(1)Hood
(2)Underhood Lamp
(3)G117
(4)G120
(5)Underhood Lamp Connector