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

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Engine Idling/Radiator Hose Hot/Closed Throttle/Park or Neutral/Closed Loop/No Switches Turned On

Cruise Active

Engine Data 1

Disengaged/Engaged

Disengaged

Cruise Inhibit Reason

Engine Data 1

1-6

Increment

Cruise Inhibit Signal Command

Engine Data 1

ON/OFF

ON

Cruise Lamp

Inputs

ON/OFF

OFF

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Cruise Control ON/OFF, Switch OFF