GM Service Manual Online
For 1990-2009 cars only

Use the scan tool Special Functions in order to perform certain tests and functions in the electronic suspension control (ESC) system and the automatic level control (ALC) system. The SERVICE RIDE CONTROL message can also be turned On and Off in the message center in the I/P. The table below lists the tests and functions that are available for the ESC system. The tests and functions are listed in alphabetical order.

Electronic Suspension Control Module

Scan Tool Output Control

Additional Menu Selection(s)

Description

ALC Trim Set

--

Performs the trim set of the ALC system.

Compressor Test

--

Commands the ALC compressor On and Off.

Exhaust Solenoid

--

Commands the compressor exhaust solenoid On and Off.

Left Front Solenoid Valve Test

--

Commands the suspension damper solenoid ON and OFF.

Left Rear Solenoid Valve Test

--

Commands the suspension damper solenoid ON and OFF.

Ride Control Lamp Test

--

Commands the ride control lamp ON and OFF.

Right Front Solenoid Valve Test

--

Commands the suspension damper solenoid ON and OFF.

Right Rear Solenoid Valve Test

--

Commands the suspension damper solenoid ON and OFF.