GM Service Manual Online
For 1990-2009 cars only

Checks

Causes

1-2 and 2-3 Shift Solenoid Valves

2nd gear starts

Engine Performance

Fuel and or exhaust system concern

TCC System

TCC Stuck ON or dragging

TFP Switch

    • Engine operating in torque management mode
    • Incorrect data input causing the PCM to command torque management mode
    • See DTC table

Torque Converter

Debris

Transmission

Low fluid

Turbine Shaft

Bushing damage