GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Powertrain Control Module (PCM)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)

A/C Request

Inputs

Yes, No

Yes

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine idling, A/C ON, ambient air temperature between 22-27°C (70-80°F)

A/C Low Side Pressure

Engine Data 2

kPa, psi

Varies

A/C Relay Command

Engine Data 1, Engine Data 2

On, Off

On

A/C Request Signal

Engine Data 2

Yes, No

Yes

ECT Sensor

Engine Data 1, Engine Data 2

°C/°F

Varies