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

PCM Power and Ground -- VIN K and 1


Object Number: 51441  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
PCM MIL and DLC - VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 2:

PCM MIL and DLC -- VIN 1 and K


Object Number: 51635  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
PCM Ignition Control VIN 1 and K
PCM Power and Ground - VIN K and 1
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 3:

PCM Ignition Control VIN 1 and K


Object Number: 51717  Size: FS
Engine Controls Components
Electronic Ignition (EI) System
PCM Fuel Pump Control VIN K
PCM MIL and DLC - VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 4:

PCM Fuel Pump Control VIN K


Object Number: 51759  Size: FS
Engine Controls Components
Fuel Metering System Components
PCM Fuel Pump and Boost Solenoid VIN 1
PCM Ignition Control VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 5:

PCM Fuel Pump and Boost Solenoid VIN 1


Object Number: 51767  Size: FS
Engine Controls Components
Fuel Metering System Components
PCM Fuel Injectors VIN 1 and K
PCM Fuel Pump Control VIN K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 6:

PCM Fuel Injectors VIN 1 and K


Object Number: 51770  Size: FS
Engine Controls Components
Fuel Metering System Components
PCM MAP, TP, ECT, IAT, and A/C Pressure Switch
PCM Fuel Pump and Boost Solenoid VIN 1
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Figure 7:

PCM MAP, TP, ECT, IAT, and A/C Pressure Switch


Object Number: 51773  Size: FS
Engine Controls Components
Fuel Metering System Components
PCM EVAP and EGR VIN 1 and K
PCM Fuel Injectors VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 8:

PCM EVAP and EGR VIN 1 and K


Object Number: 52074  Size: FS
Engine Controls Components
Exhaust Gas Recirculation (EGR) System
PCM MAF, IAC, Bank #1 KS, and Bank #2 KS VIN 1 and K
PCM MAP, TP, ECT, IAT, and A/C Pressure Switch
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Figure 9:

PCM MAF, IAC, Bank #1 KS, and Bank #2 KS VIN 1 and K


Object Number: 52081  Size: FS
Engine Controls Components
Information Sensors
PCM HO2S 1 and HO2S 2 VIN 1 and K
PCM EVAP and EGR VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 10:

PCM HO2S 1 and HO2S 2 VIN 1 and K


Object Number: 52087  Size: FS
Engine Controls Components
Information Sensors
PCM Cruise Control Module and VSS VIN 1 and K
PCM MAF, IAC, Bank #1 KS, and Bank #2 KS VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 11:

PCM Cruise Control Module and VSS VIN 1 and K


Object Number: 52091  Size: FS
Engine Controls Components
Information Sensors
PCM EBTCM, Oil Level Switch, and Generator VIN 1 and K
PCM HO2S 1 and HO2S 2 VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 12:

5 Volt Reference A


Object Number: 12294  Size: FS
Engine Controls Components
Information Sensors
Idle Air Control Valve, MAF Sensor, Knock Sensors
PCM Battery Feed, Ignition Feed, Grounds
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Figure 13:

PCM EBTCM, Oil Level Switch, and Generator VIN 1 and K


Object Number: 52104  Size: FS
Engine Controls Components
Powertrain Control Module (PCM)
PCM A/C Compressor Clutch VIN 1 and K
PCM Cruise Control Module and VSS VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Figure 14:

PCM A/C Compressor Clutch VIN 1 and K


Object Number: 52107  Size: FS
Engine Controls Components
Powertrain Control Module Controlled Air Conditioning
PCM Cooling Fans VIN 1 and K
PCM EBTCM, Oil Level Switch, and Generator VIN 1 and K
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Engine Controls Schematic References
Figure 15:

PCM Cooling Fans VIN 1 and K


Object Number: 57631  Size: FS
Engine Controls Components
Electric Cooling Fan
PCM Brake Switch, TCC, 1-2 Shift, 2-3 Shift, and PC Solenoid VIN 1 and K
PCM A/C Compressor Clutch VIN 1 and K
OBD II Symbol Description Notice
OBD II Symbol Description Notice
Handling ESD Sensitive Parts Notice
Engine Controls Schematic References
Engine Controls Schematic References