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

    â€¢ Stuck pressure regulator valve
    â€¢ Sticking pump slide

Control Valve Body Accumulator Assembly

Spacer plate and gasket misaligned or damaged

Throttle Position Sensor

Disconnected or damaged

Input Speed Sensor

    â€¢ Disconnected or damaged
    â€¢ Bolt not torqued properly

Output Speed Sensor

    â€¢ Disconnected or damaged
    â€¢ Bolt not torqued properly

Shift Solenoids

Leaking

Sport Mode active

Shorted switch or circuit