GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC)
Table 2: Powertrain Control Module (PCM)
Table 3: Hybrid Control Module (HCM)
Table 4: Starter Generator Control Module (SGCM)

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition Switch in RUN/Engine running/Automatic Transmission in PARK/Manual Transmission in NEUTRAL/Air Conditioner is OFF

Displayed Coolant Temp

Data

Celsius (C)/Fahrenheit (F)

87°C (189°F)

Monitored Coolant Temp

Data

Celsius (C)/Fahrenheit (F)

87°C (Fluctuates range 82-93°C) 189°F (Fluctuates range 180-200°F)

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition Switch in RUN/Engine running/Automatic Transmission in PARK/Manual Transmission in NEUTRAL/Air Conditioner is OFF

Coolant Level Switch

Engine Data 2

Low/OK

OK

ECT Sensor

Engine Data 1

Engine Data 2

Degrees

87°C (189°F)

Hybrid Control Module (HCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition Switch in RUN/Engine running/Automatic Transmission in PARK/Manual Transmission in NEUTRAL/Air Conditioner is OFF

Aux. Coolant Pump Relay

HPCM Data

On/Off

Off

Starter Generator Control Module (SGCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition Switch in RUN/Engine running/Automatic Transmission in PARK/Manual Transmission in NEUTRAL/Air Conditioner is OFF

SGCM Temperature

SGCM Data

Celsius (C)/Fahrenheit (F)

Varies

SGCM Fan Speed

SGCM Data

0-100%

0%

SGCM Pump Status

SGCM Data

On/Off

Off