Removal Procedure
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
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Floor Front Air Outlet Duct Bolt (1) - Remove
 Courtesy of GENERAL MOTORS COMPANY
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Floor Front Air Outlet Duct - Left Side (1) - Remove
 Courtesy of GENERAL MOTORS COMPANY
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Release the retaining tabs.
- Communication Interface Module (1) - Reposition
 Courtesy of GENERAL MOTORS COMPANY
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Disconnect the electrical connectors.
- Release the retaining tabs.
- Serial Data Gateway Module (1) - Remove