GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module

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

ECT Sensor

Engine Data 1, Engine Data 2, Engine Data 3

°C/°F

Varies