4WD: The scan tool displays On or Off. This is the state of the 4WD indicator as commanded by the instrument panel cluster (IPC).
ABS Lamp: The scan tool displays On or Off. The state   of the ABS indicator  as commanded by the IPC.
Battery: The scan tool displays On or Off. The state   of the battery indicator  as commanded by the IPC.
Battery Voltage: The scan tool displays 0-19 volts.   The voltage measured at  the battery positive voltage circuit of the BCM.
Battery Voltage: The scan tool displays 0-19 volts.   The voltage measured at  the battery positive voltage circuit of the IPC.
Brake Lamp: The scan tool displays On or Off. The state   of the BRAKE indicator  as commanded by the IPC.
Cargo Lamp On: The scan tool displays On or Off. This is the state of the cargo lamp as commanded by the IPC.
Change Engine Oil: The scan tool displays On or Off. This is the state of the change engine oil indicator as commanded by the IPC.
Check Coolant Temp: The scan tool displays On or Off. This is the state of the check coolant temperature indicator as commanded by the IPC.
Check Engine Oil Level: The scan tool displays On or Off. This is the state of the check engine oil level indicator as commanded by the IPC.
Check Engine Temp: The scan tool displays On or Off. This is the state of the check engine temperature indicator as commanded by the IPC.
Cruise Control: The scan tool displays On or Off. The state of the cruise control indicator as commanded by the IPC.
Cruise Control Active: The scan tool displays Yes or No. This is the state of the cruise control as commanded by the PCM.
Dimming: The scan tool displays Active or Inactive.   Active is displayed  when the park lamps are ON. Inactive is displayed when   the park lamps are  OFF.
Displayed Coolant Temp: The scan tool displays the coolant   temperature displayed by the  IPC in °C (°F). This value may slightly     differ from the monitored  coolant temperature.
Displayed Fuel Level: The scan tool displays the fuel   level percentage displayed by the  IPC. This value may slightly differ from     the monitored fuel level.
Displayed Odometer: The scan tool displays the odometer   data displayed by the IPC in  kilometers (miles).
Displayed Trip Odometer: The scan tool displays the   trip odometer data displayed by the  IPC in kilometers (miles).
Driver Door Jamb Sw: The scan tool displays Active or   Inactive. The output of the driver  door jamb switch. An open switch with   the door open is displayed as Active.
ECT Sensor: The scan tool displays -40 to +151°C   (-40 to +304°F).  The PCM monitors the voltage at the signal   circuit of the engine coolant temperature            sensor. The voltage  is  inversely proportional to the engine coolant      temperature.
Engine Oil Life Remaining: The scan tool displays 0-100 percent. The PCM calculates the remaining engine oil life.
Engine Oil Pressure Sensor: The scan tool displays 0 to 5 volts. The PCM monitors the engine oil pressure sensor signal circuit where a low voltage indicates low pressure.
Engine Speed: The scan tool displays 0-9999 RPM.   The IPC monitors  the engine speed signal circuit from the PCM.
Engine Speed: The scan tool displays 0-9999 RPM.   Engine speed is  computed by the PCM from the 3X reference input. It should   remain close to            desired idle under various engine loads with the   engine idling.
Fasten Seat Belts: The scan tool displays On or Off.   The state of the fasten safety  belt indicator as commanded by the IPC.
Fuel Level Sensor: The scan tool displays 0-5 volts. The PCM monitors the fuel level sensor signal circuit where 0 V is an empty tank.
Fuel Tank Level Remaining: The scan tool displays 0-100%.   The PCM calculates the amount  of fuel remaining in the tank based on the   input from the fuel level sensor.
Fuel Tank Level Remaining: The scan tool displays liters.   The PCM calculates the amount  of fuel remaining in the tank based on the   input from the fuel level sensor.
High Beam Lamp: The scan tool displays On or Off. The   state of the high beam indicator  as commanded by the IPC.
Ignition 1: The scan tool displays Active or Inactive.   The BCM displays Active  if it senses voltage at the ignition 1 input.
Ignition 1 Signal: The scan tool displays 0-16 volts. The ignition 1 signal represents the system voltage detected by the PCM at the ignition voltage circuit.
Ignition 3: The scan tool displays Active or Inactive.   The BCM displays Active  if it senses voltage at the ignition 3 input.
Key in Ignition: The scan tool displays Yes or No. The   BCM monitors the key in ignition  signal circuit. A closed switch with the   key in the ignition is displayed  as Yes.
Left Turn Signal: The scan tool displays On or Off.   The BCM monitors the signal circuit  of the left turn signal switch. A closed   switch is displayed as On.
Low Coolant: The scan tool displays On or Off. This is the state of the low coolant indicator as commanded by the IPC.
Low Fuel Lamp: The scan tool displays On or Off. The   state of the low fuel indicator  as commanded by the IPC.
Low Washer Fluid: The scan tool displays On or Off. The IPC monitors the windshield washer solvent level switch, where a closed switch with low washer fluid is displayed as On.
MIL (Malfunction Indicator Lamp) Command: The scan tool displays On or Off. This is the commanded state of the MIL (Malfunction Indicator Lamp) by the PCM.
Module Part Number: The scan tool displays the GM part   number of the IPC.
Monitored Coolant Temp: The scan tool displays the coolant   temperature data in °C (°F)  as provided to the IPC from the PCM  via  the class 2 serial data link.
Monitored Fuel Level: The scan tool displays the fuel   level percentage as provided to  the IPC from the PCM via the class 2   serial data link.
Oil Pressure Lamp: The scan tool displays On or Off. The state of the oil pressure indicator as commanded by the IPC. The IPC monitors the engine oil pressure sensor signal where a low sensor resistance is proportional to low oil pressure.
Overspeed Lamp: The scan tool displays On or Off. The   state of the overspeed indicator  as commanded by the IPC.
Park Brake Switch: The scan tool displays Set or Released.     The BCM monitors the  park brake switch signal circuit .
Park Lamps: The scan tool displays On or Off. The BCM   monitors the signal circuit  of the park lamp switch. A closed switch is  displayed  as On.
Park Switch: The scan tool displays Open or Closed.   The state of the park position  switch. A closed switch with the shifter  in  Park is displayed as Closed.
PRNDL State: The scan tool displays the PRNDL range   of the vehicle as communicated  to the IPC by the PCM via the class 2      serial data link.
Reduced Engine Power: The scan tool displays Inactive or Active. This is the state of the Reduced Engine Power indicator as commanded by the IPC.
Right Turn Signal: The scan tool displays On or Off.   The BCM monitors the signal circuit  of the right turn signal switch. A closed   switch is displayed as On.
Security Lamp: The scan tool displays On or Off. The   state of the security indicator  as commanded by the IPC.
Security Lamp State: The scan tool displays On, Off   or Flashing. The state of the security  indicator as commanded by the BCM.
Service 4WD: The scan tool displays On or Off. The state   of the Service 4WD  indicator as commanded by the IPC.
Tow/Haul: The scan tool displays On or Off. The IPC   monitors the signal circuit  of the tow/haul switch. A closed switch is displayed   as On.
Trans. Fluid Hot: The scan tool displays On or Off. This is the state of trans fluid hot indicator as commanded by the IPC.
Trans. Hot...Idle Engine: The scan tool displays On or Off. This is the state of trans hot indicator as commanded by the IPC.
Trip Reset Switch: The scan tool displays Active or   Inactive. The IPC monitors the  trip reset switch. A closed switch is displayed   as Active.
Upshift Lamp: The scan tool displays On or Off. The   state of the Upshift indicator  as commanded by the IPC.
Vehicle Speed: The scan tool displays 0-255 km/h   (0-155 mph).  The BCM monitors the vehicle speed signal circuit   from the PCM.
Vehicle Speed: The scan tool displays 0-255 km/h   (0-155 mph).  The IPC monitors the vehicle speed signal circuit   from the PCM.
Vehicle Speed Sensor: The scan tool displays 0-255 km/h   (0-155 mph).  The PCM monitors the voltage at the signal circuit   of the vehicle speed sensor.  The voltage is proportional to the vehicle  speed.