GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2003 🢒 Aurora 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T80-E 🢒 Extended or Delayed Upshifts

Checks

Causes

Calibration

Incorrect platform or level

Pressure Regulator Boost Valve

Stuck in bushing

Transmission Fluid Pressure Manual Valve Position Switch

Inoperative