WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS COMPANY
Using DT-44737
Shift Rail Bearing Remover (2) and GE-02619-A
Slide Hammer w/Adapter (3) remove and discard the transfer case shift cam shaft bearing (1).