GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Cluster (IPC)
Table 2: Powertrain Control Module (PCM)

Instrument Cluster (IPC)

Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Calibration ID

Module Information

Numeric

Varies

Low Coolant Level

Inputs

OK/Low

OK

PROM ID

Module Information

Numeric

Varies

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Low Speed Fan Relay

Engine Data 2

On/Off

Varies

SP/High Speed Fan Relay

Engine Data 2

On/Off

Varies