F 550 2WD Super Duty V8-6.4L DSL Turbo (2008)
11. Remove the RH and LH C-pillar trim panels.
12. If equipped, remove the roof opening panel trim.
13. Remove the 3 headliner pushpin retainers
14. Remove the rear window.
15. CAUTION: Make sure not to crease the headliner when removing it from the vehicle.
Remove the headliner.
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With an assistant, remove the headliner through the rear window glass opening.
16. To install, reverse the removal procedure.