GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC)
Table 2: Engine Control Module (ECM)

Instrument Panel Cluster (IPC)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Display(s) Test

Output Control

The IPC illuminates all of the display segments and sweeps all gages when you select On.

Cluster Dimming

Output Control

The IPC dims from 0-100% when you select INCREASE or DECREASE by 20% increments.

Engine Control Module (ECM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Fuel Pump Relay

Engine Output Controls

The ECM commands the fuel pump relay on and off.

MIL

Dash Lamps

The ECM commands the MIL indicator on and off.

Hot Lamp

Dash Lamps

The ECM commands the engine coolant temperature indicator on and off.

Service Vehicle Soon (SVS) Lamp

Dash Lamps

The ECM commands the SVS indicator on and off.