GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Engine Control Module (ECM) - 3.0L (L81)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

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

Low Coolant

Inputs

Yes/No

No

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 Sensor

Inputs/Outputs

°C/°F

Varies

Fan Control 1 Command

Outputs

On/Off

Varies

Fan Control 2 Command

Outputs

On/Off

Varies

Fan Speed

Outputs

Low/Med/High

No