Transmission Control Systems: Technical Service Bulletins

• Customer Interest
  • A/T - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
  • Drivetrain - 4X4 Inoperative/Lamp Flashing/DTC's Set
  • Transfer Case Control Module - 4WD Lamp ON/DTC'S Set
  • A/T - Slow/No Gear Engagement/Engine No Start
  • AWD/4WD - AWD/4WD Lamps/System Inop./DTC C0550
  • Drivetrain - Service 4WD Light/DTC C0374 Set
• By Symptom
  • Chattering
    • A/T - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
  • Customer Interest
    • A/T - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
    • Drivetrain - 4X4 Inoperative/Lamp Flashing/DTC's Set
    • Transfer Case Control Module - 4WD Lamp ON/DTC'S Set
    • A/T - Slow/No Gear Engagement/Engine No Start
    • AWD/4WD - AWD/4WD Lamps/System Inop./DTC C0550
    • Drivetrain - Service 4WD Light/DTC C0374 Set
  • Difficult gear selection
    • A/T - Slow/No Gear Engagement/Engine No Start
  • False instrument warning light/gauges
    • Drivetrain - 4X4 Inoperative/Lamp Flashing/DTC's Set
    • Transfer Case Control Module - 4WD Lamp ON/DTC'S Set
  • Inoperative
    • Drivetrain - 4X4 Inoperative/Lamp Flashing/DTC's Set
    • AWD/4WD - AWD/4WD Lamps/System Inop./DTC C0550
  • No shift/Incorrect gear engagement
    • A/T - Slow/No Gear Engagement/Engine No Start
  • Slipping
    • A/T - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
    • A/T - Slow/No Gear Engagement/Engine No Start
  • Starting problems
    • A/T - Slow/No Gear Engagement/Engine No Start
  • Vibration
    • A/T - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
• 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 - 4L60-E 1-2 Shift Shudder/Slipping/Vibration
  • Drivetrain - 4X4 Inoperative/Lamp Flashing/DTC's Set
  • A/T - TCM Fast Learn Procedure Requirement
  • Transfer Case Control Module - 4WD Lamp ON/DTC'S Set
  • A/T - Slow/No Gear Engagement/Engine No Start
  • AWD/4WD - AWD/4WD Lamps/System Inop./DTC C0550
  • Drivetrain - Transfer Case Control Module Replacement
  • Drivetrain - Updated Transfer Case Speed Sensor Conn.
  • Drivetrain - Service 4WD Light/DTC C0374 Set