LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Automatic Transmission - 5L40-E/5L50-E - Service, Diagnosis & Trouble Shooting) >> Inaccurate Shift Points

Inaccurate Shift Points

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Inaccurate Shift Points

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 (5L40-E/5L50-E) .
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
  • Bolt not torqued properly
Output Speed Sensor
  • Disconnected or damaged
  • Bolt not torqued properly
Shift Solenoids Leaking
Sport Mode active Shorted switch or circuit