Removal Procedure

Insert a small, flat-bladed tool between the interior lamp/multifunction switch/reading lamp housing and the overhead console.
Press inward and down in order to release the interior lamp/multifunction switch/reading lamp housing from the overhead console.

Fig 1: Interior Lamp/Multifunction Switch/Reading Lamp Housing & Overhead Console
Courtesy of GENERAL MOTORS CORP.
Remove the interior lamp/multifunction switch/reading lamp housing from the overhead console.
Disconnect the electrical connectors from the interior lamp/multifunction switch.

Fig 2: Disconnecting Electrical Connectors From Interior Lamp/Multifunction Switch
Courtesy of GENERAL MOTORS CORP.
Remove the interior lamp/multifunction switch by using pliers in order to compress the interior lamp/multifunction switch retainers while pulling switch away from the housing.

Fig 3: Removing Interior Lamp/Multifunction Switch
Courtesy of GENERAL MOTORS CORP.