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Home >> GMC >> 2023 >> Terrain AT4 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T45 (M3U) - Repair Instructions - On Vehicle >> Repair Instructions - On Vehicle >> Transmission Control Module Replacement

Transmission Control Module Replacement

GM4588503Courtesy of GENERAL MOTORS COMPANY
NOTE: Callouts in the following chart represent components shown in graphic above.
Callout Component Name
Preliminary Procedure 
Underbody Front Air Deflector Replacement (Terrain)
1 Transmission Control Module

Procedure

  1. Disconnect the electrical connector.
  2. Remove the module from the module bracket by releasing the retaining tabs.
  3. Program the transmission control module, if replaced. Q77 Transmission Control Solenoid Valve Characterization Programming
    NOTE:

    Radiator assembly removed for clarity.