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

Junction Block 1


Object Number: 334464  Size: LF
(1)Junction Block 1 C5
(2)Junction Block 1 C7 (on backside)
(3)Junction Block 1 C3
(4)Junction Block 1 C2
(5)Junction Block 1 C1
(6)Flasher Relay
(7)C/OPN Relay
(8)P/W Relay
(9)Junction Block 1
(10)Junction Block 1 C6 (on backside)
(11)Junction Block 1 C4
Figure 2:

Junction Block 2


Object Number: 425271  Size: MF
(1)Not Used
(2)ST Fuse 5A
(3)D/L Fuse 30A
(4)Fog Fuse 15A
(5)S-HTR Fuse 15A
(6)Not Used
(7)CIG Fuse 15A
(8)DEF Fuse 40A
(9)Dome Noise Filter
(10)POWER Fuse 30A
(11)Short Pin
(12)C2
(13)C5
(14)C4
(15)ECU-B Fuse 7.5A
(16)C3
(17)C1
(18)Not Used
(19)DEF-I/UP Fuse 10A
(20)WIP Fuse 20A
(21)GAUGE Fuse 10A
(22)Not Used
(23)TURN Fuse 7.5A
(24)STOP Fuse 15A
(25)IGN Fuse 7.5A
(26)TAIL Fuse 15A
(27)ECU-IG Fuse 10A
(28)OBD Fuse 7.5A
(29)Not Used
Figure 3:

Fuse and Relay Block 1


Object Number: 380712  Size: MF
(1)ST Relay
(2)HEAD Relay
(3)EFI or F-HTR Relay
(4)Fuse Puller
(5)ENGINE MAIN Relay
(6)HORN Relay
(7)AM1 Fuse 50A
(8)RDI Fuse 30A
(9)FAN Relay
(10)ALT-S Fuse 7.5A
(11)Empty
(12)Not Used
(13)HORN Fuse 20A
(14)Not Used
(15)Not Used
(16)AM2 Fuse 30A
(17)HAZARD Fuse 20A
(18)DOME Fuse 20A
(19)ALT Fuse 100A
(20)ABS Fuse 50A
(21)MAIN Fuse 50A
(22)Not Used
(23)Fuse and Relay Block 1
Figure 4:

Fuse and Relay Block 2


Object Number: 334466  Size: SF
(1)A/C MG Relay
(2)A/C FAN No.3 Relay
(3)A/C FAN No.3 Relay
(4)Dimmer Relay
(5)CDS Fuse 30A
(6)HEAD (LH-LWR) Fuse 10A
(7)HEAD (RH-LWR) Fuse 10A
(8)DRL Fuse 7.5A
(9)Fuse and Relay Block 2
Figure 5:

Fuse and Relay Block 3


Object Number: 334467  Size: SF
(1)HTR Fuse 50A
(2)HTR Relay
(3)DRL Relay
(4)Fuse and Relay Block 3
(5)A/C Fuse 7.5A
Figure 6:

Engine Compartment View


Object Number: 326378  Size: LF
(1)Spark Plug 4
(2)Ignition Coil 1
(3)Ignition Coil 2
(4)Brake Pressure Modulator Valve (BPMV)
(5)Data Link Connector (Underhood)
(6)Ambient Light Sensor
(7)Intake Temperature (IAT) Sensor
(8)Fuse and Relay Block 1
(9)Fuse and Relay Block 2
(10)Battery
(11)Throttle Position (TP) Sensor (In Back)
(12)Throttle Linkage
(13)Horn
(14)Camshaft Position (CMP) Sensor Right Rear of Cylinder Head
(15)Ambient Air Temperature Sensor (Tachometer Only)
(16)Auxiliary Radiator Fan Motor (Attached to Rear of Radiator) (With A/C Only)
(17)Knock Sensor
(18)A/C Compressor Clutch (Below Generator)
(19)Refrigerant Pressure Switch (With A/C Only)
(20)Fuse and Relay Block 3
(21)Generator
(22)A/C Accumulator (With A/C Only)
(23)Windshield Washer Pump
(24)Windshield Wiper Motor
(25)Cruise Control Servo
(26)Spark Plug 1
(27)Spark Plug 2
(28)Spark Plug 3
Figure 7:

Instrument Panel Assembly (Left Side)


Object Number: 326547  Size: MF
(1)Hazard Switch
(2)Rear Defogger Switch
(3)Overdrive Switch
(4)Radio
(5)Junction Block 2
(6)OBD II DLC
(7)Junction Block 1
(8)Multifunction Alarm Module
(9)Outside Rearview Mirror Controller
(10)IP Lamp Dimmer
(11)Ignition Switch
(12)Junction Block 3
Figure 8:

Passthrough and Ground Views


Object Number: 326462  Size: LF
(1)G200
(2)P500
(3)P100
(4)P102
(5)G101
(6)G100
(7)G103
(8)G105, G106
(9)G104
(10)P101
(11)P600
(12)G203
(13)P800
(14)G301
(15)P301
(16)G400
(17)G300
(18)P300
(19)G202
(20)P700
(21)G201, G204