Remove
Remove the headliner. See Headliner (Remove and Install).
Measure and record the gaps from the fixed roof glass to windshield,
body sides, and backlight glass.
Note: The gap measurements are used for the installation of the
fixed roof glass.
Apply masking tape to protect the paint
Procedure
Clean the installation surface of the spoiler with isopropyl alcohol
(IPA) wipes, and allow it to dry before continuing.
Note: Clean any moisture or contaminates that might be
present from rain or vehicle washing, otherwise this might result in poor
adhesion of the rear spoiler.