GM Service Manual Online
For 1990-2009 cars only

Check

Causes

DEFINITION: An upshift or a downshift, or TCC apply that occurs at a speed outside of the calibrated range. Refer to Shift Speed.

Fluid Pump Assembly

    • Stuck pressure regulator valve
    • Sticking pump slide

Control Valve Body Accumulator Assembly

Spacer plate and gasket misaligned or damaged

Throttle Position Sensor

Disconnected or damaged

Input Speed Sensor

    • Disconnected or damaged
    • Sensor to transmission case bolt not tightened correctly

Output Speed Sensor

    • Disconnected or damaged
    • Sensor to transmission case bolt not tightened correctly

Shift Solenoids

Leaking

Power Mode Active

Refer to Sport Mode Switch/Indicator Always On or Inoperative