Automatic Level Control Scan Tool Data Definitions:

The Automatic Level Control (ALC) Scan Tool Data Definitions contains a brief description of all scan tool parameters.

ALC Compressor

The scan tool displays Yes or No. The scan tool will display Yes when the vehicle trim height is below a preset value. The ALC Compressor inflates the rear airlift shocks until the vehicle reaches the desired trim height. When the vehicle is at the desired trim height, the scan tool will display No.

ALC Exhaust Solenoid

The scan tool displays Yes or No. The scan tool will display Yes when the vehicle trim height is above a preset value. The ALC Exhaust Solenoid deflates the rear airlift shocks until the vehicle reaches the desired trim height. When the vehicle is at the desired trim height, the scan tool will display No.

Battery Voltage Signal

The scan tool displays 0-26.0 volts. The battery voltage represents the system voltage measured at the controller battery input.

DSP Software Version

The scan tool displays the controller DSP software version number for service identification.

EEPROM Calibration ID

The scan tool displays the controller EEPROM calibration ID number for service identification.

GM Part Number

The scan tool displays the controller part number for service identification.

GMSCM Software Version

The scan tool displays the controller GMSCM software version number for service identification.