1997 Buick Riviera Owner's Manual - Page 273

I If your vehicle is damaged an accident and the in your headlamp aim seems to be affected, see Buick dealer. Headlamps on damaged vehicles may require 1. Remove the panel on the underside bulb assembly recalibration of the horizontal aim by of the your Buick dealer. in by pulling thetwo fasteners that hold it place. To check the aim, the vehicle should be-properly 2. Reach in to press the locking tab and twist the bulb prepared as follows: socket one-quarter of a turn counterclockwise. 0 The vehicle must haveall four tires on a perfectly 3. .Replacethe bulb, then reassemble by reversing Steps level surface. 1 and 2. 0 The vehicle should not have any snow, ice or mud Headlamp Aiming attached to it. of Your vehicle has the composite headlamp system. These 0 There should not be any cargo or loading the vehicle, exceptit should have a tank of gas and full headlamps have horizontal and vertical aim indicators one person or160 lbs. (75 kg) on the driver's seat. The airn has been pre-set at the factory should need and no further adjustment. Tires should be properly inflated. Front Turn Signal Lamps The turn signal bulb is located in thefront fascia. 6.