2006 Buick Ranier

First, I want to apologize that your question was not answered right away.

Here are the directions per service book.
"Â Pull up on the retaining tabs (1) in order to remove the headlamp assembly from the headlamp panel.
"Â Disconnect the headlamp electrical connector (2) from the headlamp assembly.
"Â Remove the park/turn socket (3) from the headlamp assembly.
"Â Remove the headlamp assembly from the headlamp panel.

You might have to wiggle the retaining tabs and headlamp assembly while pulling outward in order to remove it.