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

ECU and Connectors


Object Number: 401943  Size: SH
(1)AF ECU
(2)AF ECU Connector -- C001 Blue
(3)AF ECU Connector -- C002 Red
(4)AF ECU Connector -- C003 Clear
Figure 2:

Engine Compartment Fuse/Relay Center


Object Number: 401945  Size: MF
(1)Engine Compartment Fuse/Relay Center
Figure 3:

Fuel Gauge Switch


Object Number: 401951  Size: MF
(1)IP Retainer
(2)C254
(3)Fuel Gauge Selector Switch/Fuel Indicator Light/Panel Dimmer Switch
(4)Cluster Trimplate
Figure 4:

Ground


Object Number: 401948  Size: MF
(1)G112
Figure 5:

HPL Connectors


Object Number: 401953  Size: SH
(1)Fuel Pressure Sensor (FPS)
(2)C452
(3)C453 (BLK)
(4)C451 (GRY)
(5)High Pressure Lock-off (HPL) with Internal Fuel Temperature Sensor (FTS)
Figure 6:

In-Line Engine Harness Connectors


Object Number: 401947  Size: SH
(1)C019 (BLK)
(2)C018 (BLK)
(3)C017 (GRY)
Figure 7:

IP Fuse Block


Object Number: 401950  Size: SH
(1)IP Fuse Block
Figure 8:

IP In-Line Connectors


Object Number: 401949  Size: SH
(1)C200
(2)C251
(3)P001
(4)C250
Figure 9:

Relays and Connectors


Object Number: 401944  Size: SH
(1)Ignition Relay
(2)Fuel Pump Relay
(3)Lock-off Relay
(4)Fuel Gauge Relay
(5)C012
(6)C011
(7)C007
(8)C004
Figure 10:

Underhood Module Connectors


Object Number: 401946  Size: SH
(1)Gas Mass Sensor/Mixture Control Valve (GMS/MCV)
(2)C021
(3)C010
(4)C009
(5)C014
(6)Low Pressure Lock-off (LPL)
Figure 11:

Vent Boot Connectors


Object Number: 401952  Size: SH
(1)C454
(2)P401
(3)C450