1999 Pontiac Grand Prix Owner's Manual - Page 144

yellowblue 4. Turn the DIM dial down until the HUD image is no brighter than necessary. To turn the HUD off, turn the DIM dial all the way down. If the sun comes out, it becomes cloudy, or if you turn on your headlamps, you may need to adjust the HUD brightness again. Polarized sunglasses could make the HUD image harder to see. Push the ENG/MET button on the trip calculator to switch the HUD display from English to metric or metric to English. If your vehicle is not equipped with the trip calculator, you can't change the display. Clean the inside of the windshield as needed to remove any dirt or film that reduces the sharpness or clarity of the HUD image. To clean the HUD, spray household glass cleaner on a soft, clean cloth. Wipe the HUD lens gently, then dry it. Do not spray cleaner directly on the lens because the cleaner could leak into the unit. Care of the Head-Up Display 2-84