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Headlamp Control Module Replacement (T4L without T95 and UVG)

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
GM5247386Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
Front Headlamp Replacement 
1 Headlamp LED Driver Module Bolt [3x]
Tighten 
2.5 N.m (22 lb in)
2 Headlamp Control Module

Procedure

  1. Disconnect the electrical connectors.
  2. Run all necessary programming and setup procedures. Control Module References