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High Frequency Antenna Replacement

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.
GM4214332Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
It is only necessary to lower the headliner. Only do those steps in headliner replacement that will lower the headliner enough to gain access to the part. Headlining Trim Panel Replacement (Hatchback) , or Headlining Trim Panel Replacement (Wagon)
1 High Frequency Antenna
CAUTION:

Refer to Fastener Caution .

Procedure

  1. Loosen the integral bolt.
  2. Disconnect the antenna cables.
  3. Feed the wiring and cable up through the hole in the roof panel.

Tighten 
9 N.m (80 lb in)