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Home >> Chevrolet >> 2012 >> Tahoe Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1728 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Symptom Troubleshooting And Diagnosis) >> Second Gear Start

Second Gear Start

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
Signal Noise on Vehicle Speed Sensor (VSS) Circuit Chassis vibrations, incorrect harness routing, owner installed electronic components creating electrical interference
Diagnostic Trouble Code (DTC) Electrical or mechanical 1-2 Shift Solenoid Valve (367) malfunction
Leaking Actuator Feed Limit (AFL) Circuit Spacer plate (48), spacer plate gaskets (47 or 52), control valve body (60), mispositioned, damaged or poor sealing/mating surface exist
Blocked or restricted Valve Body Spacer Plate (48) Spacer Plate to Case Gasket (47) or Spacer Plate to Valve Body Gasket (52) Trapped sediment or metal particles
Stuck 1-2 Shift Valve (366)
  • Trapped sediment or metal particles
  • Binding shift valve or worn valve body bore