GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module (PCM) 3.8L

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

GEN L-Terminal Signal Command

Engine Data 2

On/Off

Off

Ignition 1 Signal

Engine Data 1, Engine Data 2

Volts

12.6 Volts

Starter Enable Relay Circuit Status

Engine Data 2

OK/Fault

OK

Starter Relay Command

Engine Data 2

On/Off

Off

Powertrain Control Module (PCM) 5.7L

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF

GEN F-Terminal Signal

Engine Data 2

%

0%

GEN L-Terminal Signal

Engine Data 2

On/Off

Off

Ignition 1 Signal

Engine Data 1, Engine Data 2

Volts

12.6 Volts