GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC)
Table 2: Engine Control Module
Table 3: Starter/Generator Control Module (SGCM)

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, engine OFF, brake fluid level normal, and park brake released

Low Brake Fluid Level

--

Volts

2.5

Park Brake Switch

Inputs for Analog Dash

Off/On

Off

Engine Control Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, engine On

Brake Booster Pressure Sensor

Hybrid Data

KPa

Varies

Brake Press. Sen. 2

Hybrid Data

KPa

Varies

Starter/Generator Control Module (SGCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, engine OFF, brake fluid level normal, and park brake released

Hill Hold Solenoid 1

PWM on time

Percentage

2.5

Hill Hold Solenoid 2

PWM on time

Percentage

2.5

Hill Hold Solenoid Relay

Enable/Disable

Varies

2.5

Hill Hold Solenoid Relay

Enable/Disable

Varies

2.5

Hill Hold Solenoid 1

Enable/Disable

Varies

2.5

Hill Hold Solenoid 2

Enable/Disable

Varies

2.5