1999 Buick Riviera Owner's Manual - Page 241

yellowblue Hood Release Pull the handle inside the vehicle to open the hood. The handle is located on the lower left side of the instrument panel, next to the parking brake release. Then go to the front of the vehicle and locate the secondary hood release. It is under the front edge of the grille, slightly right of center as you face the vehicle. Push up on the secondary hood release lever as you lift up the hood. 6-9