GM Service Manual Online
For 1990-2009 cars only

Ignition Switch and Powertrain Control Module Connectors Notice for Isuzu Ascender - 4WD 2004

Notice: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.