GM Service Manual Online
For 1990-2009 cars only

The following transmission-related indicators and messages may be displayed on the instrument panel cluster (IPC). For a complete listing and description of all vehicle indicators and messages, refer to Indicator/Warning Message Description and Operation .

4WD: This indicator illuminates when the powertrain control module (PCM) detects that 4WD has been requested.

Tow/Haul: This indicator illuminates when the PCM detects that tow/haul mode has been requested.

Transmission Hot: This message is displayed when the PCM detects a transmission fluid temperature (TFT) equal to or greater than 130°C (266°F) for 5 seconds.

Trans Hot...Idle Engine: This message is displayed when the PCM detects a TFT equal to or greater than 135°C (275°F).