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

Power, Ground and MIL


Object Number: 21443  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Data Link Connector
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 2:

Data Link Connector


Object Number: 21444  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Ignition System
Power, Ground and MIL
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 3:

Ignition System


Object Number: 21446  Size: FS
Engine Controls Components
Distributor Ignition (DI) System
Fuel Pump
Data Link Connector
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 4:

Fuel Pump


Object Number: 21448  Size: FS
Engine Controls Components
Fuel Supply Components
Fuel Injectors
Ignition System
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 5:

Fuel Injectors


Object Number: 21450  Size: FS
Engine Controls Components
Fuel Metering System Components
Engine Data Sensors
Fuel Pump
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 6:

Engine Data Sensors


Object Number: 21475  Size: FS
Engine Controls Components
Information Sensors
Heated Oxygen Sensors
Fuel Injectors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 7:

Heated Oxygen Sensors


Object Number: 21477  Size: FS
Engine Controls Components
Information Sensors
Engine Data Sensors, TCS Active Signal, VSS Output
Engine Data Sensors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 8:

Engine Data Sensors, TCS Active Signal, VSS Output


Object Number: 21480  Size: FS
Engine Controls Components
Information Sensors
MAF, EVAP and EGR
Heated Oxygen Sensors
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 9:

MAF, EVAP and EGR


Object Number: 21481  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
AIR and IAC
Engine Data Sensors, TCS Active Signal, VSS Output
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 10:

AIR and IAC


Object Number: 21482  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Reverse Lockout and Skip Shift
MAF, EVAP and EGR
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 11:

Reverse Lockout and Skip Shift


Object Number: 21483  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Transmission Controls
AIR and IAC
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 12:

Transmission Controls


Object Number: 21484  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
Transmission Controls
Reverse Lockout and Skip Shift
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 13:

Transmission Controls


Object Number: 21485  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
A/C Controls
Transmission Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 14:

A/C Controls


Object Number: 21486  Size: FS
Engine Controls Components
Air Conditioning (A/C) Clutch Circuit
Engine Cooling Fans
Transmission Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Figure 15:

Engine Cooling Fans


Object Number: 21488  Size: FS
Engine Controls Components
Electric Cooling Fan
A/C Controls
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice