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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission - 4L80-E/4L85-E - Service, Diagnosis & Trouble Shooting) >> Troubleshooting >> Delayed Shift 1 to 2

Delayed Shift 1 to 2

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Delayed Shift 1 to 2

Checks Cause
AT Output Shaft Speed Sensor Assembly (22)
  • A pinched or broken wire
  • A loose connector
  • An incorrect air gap
  • An inadequate signal
  • Coil damage
AT Input Shaft Speed Sensor Assembly (22)
  • A pinched or damaged wire
  • Coil damage
  • An inadequate signal
AT Fluid Pressure Manual Valve Position Switch Assembly (40)
  • A loose connector
  • A pinched wire
  • No signal to the PCM
  • Loose bolts causing leakage
Calibration PROM Incorrect
Check the PCM for current DTCs.
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