GM Service Manual Online
For 1990-2009 cars only
Table 1: Powertrain Control Module (PCM) 4.2 L (LL8), 5.3L (LM4)
Table 2: Instrument Panel Cluster

Powertrain Control Module (PCM) 4.2 L (LL8), 5.3L (LM4)

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

ENG 1, ENG 2, ENG 3, EVAP, Misfire, HO2S

Degrees

°C/°F

IAT Sensor

ENG 1, ENG 2, ENG 3, EVAP, Misfire, HO2S

Degrees

°C/°F

Instrument Panel Cluster

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 1

°C/°F

Varies

Monitored Coolant Temp

Data 1

°C/°F

Varies