GMC 2008 Yukon Denali Owner's Manual page 349

2. Then go to the front of the vehicle and locate
the secondary hood release, near the center of
the grille.
3. Push the secondary hood release to the right.
4. Lift the hood.
Before closing the hood, be sure all the filler caps
are on properly. Then bring the hood from full open
to within 6 inches (152 mm) from the closed
position, pause, then push the front center of the
hood with a swift, firm motion to fully close the hood.
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