GM Service Manual Online
For 1990-2009 cars only

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

Coolant Temp

Data

°C/°F

Varies

Coolant Temp Sensor

Data

Volts

Varies

Coolant Warning Lamp

Data

On/Off

Off

Engine Control Module (ECM) 3.0L (L81)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

ECT

Eng 1

°C/°F

Varies