Transmission Control Systems: Technical Service Bulletins

• Customer Interest
  • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
  • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • A/T - Loss of 4th Gear/Busy 3-4 Shifting/TCC Cycling
  • A/T - Engine Speed Flare During Part Throttle Downshift
  • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
• By Symptom
  • Customer Interest
    • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
    • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
    • A/T - Loss of 4th Gear/Busy 3-4 Shifting/TCC Cycling
    • A/T - Engine Speed Flare During Part Throttle Downshift
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Erratic Shifting
    • A/T - Loss of 4th Gear/Busy 3-4 Shifting/TCC Cycling
  • Hard Shifting
    • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • Hunting-Surging
    • A/T - Engine Speed Flare During Part Throttle Downshift
  • No shift/Incorrect gear engagement
    • A/T - Loss of 4th Gear/Busy 3-4 Shifting/TCC Cycling
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Slipping
    • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder
  • Sticking/Binding
    • A/T - Park/Neutral Switch Connector Cannot Be Removed
• All Technical Service Bulletins
  • Engine Controls - Non-GM Engine/Transmission Calibration ID
    • Overview
    • Table of Contents
    • Sections
      • Section 1
      • Section 2
      • Section 3
      • Section 4
      • Section 5
      • Section 6
      • Section 7
      • Section 8
      • Section 9
      • Section 10
      • Section 11
      • Section 12 - Waranty Information
  • A/T - Revised Diagnostic Information
  • A/T - 1-2 or 2-3 Slip/Flare, Launch Shudder & DTC P1870
  • A/T - 4L60-E Harsh 1-2 Gear Upshift/MIL/SES/CEL ON
  • A/T - Shift Solenoid Update
  • A/T - Loss of 4th Gear/Busy 3-4 Shifting/TCC Cycling
  • A/T - Engine Speed Flare During Part Throttle Downshift
  • A/T - Park/Neutral Switch Connector Cannot Be Removed
  • A/T - Upshift Flare/No 3rd or 4th/Launch Shudder