Scan Tool Data List for GMC Truck GMC Sierra Denali 2003

Ignition ON/Engine OFF

Gasoline Engines Only

Ignition 1 Signal

Engine 1,2 Data

Volts

9-14 v

GEN L--Terminal Signal Command

Engine 2 Data

On/OFF

On

GEN F--Terminal Signal

Engine 2 Data

%

10-90%

Ignition ON/Engine OFF

6.6L LB7 Diesel

Ignition 1 Signal

Engine 2 Data

Volts

9-14 v