1. Remove the screws from the roof basket mounts through the stanchion.



2. With the aid of an assistant, remove the roof basket from the vehicle.

Important: It is necessary to use the following alignment marks when aligning the front cross bar. Marks are located on the top surface of the passenger side roof rail, and should be aligned with the arrow (1) on the crossbar. All roof rack kits include a stop clip, which should be placed on the roof rail in the appropriate stop location. Failure to align to these marks could result in component interference and excessive wind noise.

On vehicles not equipped with sunroofs, align the front cross bar with the OnStar stop (1), located approximately 7.5 inches behind the front outer marking light.

On vehicles equipped with sunroofs, align the arrow on the cross bar with the sunroof stop (1), located approximately 20 inches rearward on the OnStar stop.

Important: Some of the installation procedures apply only if the luggage basket was never previously installed on the vehicle.

1. Loosen the crossbar stanchion knobs and adjust the crossbars so that the centers of the crossbars are spread out to 140.5 cm (55 inches).



2. Remove the end caps from the crossbars of the roof rack on both sides.



3. Peel back the weatherstrip on the crossbar to reveal the stanchion screws.



4. Remove the stanchion screws from both crossbars and save for later reuse.



5. Replace the end caps to the crossbars of the roof rack and store for later reuse.



6. With the aid of an assistant, lower the roof basket into the position so that the mounts of the basket rest in the stanchions where the crossbars were removed.
7. When correctly seated, hand tighten the stanchion knobs.

Notice: Refer to Fastener Notice in the Preface section.




8. Install the screws which were removed from the crossbars earlier through the roof basket mounts and into the stanchion.

Tighten
Tighten the screws to 5 N·m (44 lb in).