GM Service Manual Online
For 1990-2009 cars only

Powertrain Control Module

Scan Tool Output Control

Additional Menu Selection

Description

Engine Output Controls

GEN L- Terminal

The PCM commands the generator OFF when you select Off. The generator will stop generating and output voltage.

Engine Output Controls

Dash Lamps/GEN

The PCM grounds the charge indicator control circuit when it is commanded ON. This illuminates the charge indicator.