GM Service Manual Online
For 1990-2009 cars only

Checks

Cause

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

ECM/PCM Calibration Information

Incorrect calibration in the ECM/PCM.

Throttle Position (TP) Sensor

Misadjusted or faulty TP sensor.