1996 Buick Riviera Owner's Manual - Page 337

When you are doingthis check, the vehicle could move suddenly.If it does, you or others couldbe injured. Follow the steps below. 1. Before you start, be sure you have enough room around theveJicle. It should be parked a level on surfac-e. Steering Column Lock Check While parked, and with parking brake set,try to turn the the keyto LOCK in each shift lever position. The key should turn toLOCK only when theshift lever is in PARK (P). The key should come out only in LOCK. 7-9.38