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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1004 (Automatic Transmission - 4L80-E/4L85-E (Troubleshooting)) >> Troubleshooting >> Delayed Shift 1 to 2

Delayed Shift 1 to 2

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
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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