1993 Buick Century Owner's Manual - Page 81

If your automatic transaxle has Overdrive,"D"is like but you never go into Overdrive.Here are some times you might choose "D"instead of "@": This position gives even more power (but lower you fuel economy) than 2. You can use it on very steep hills, or in deep snowor mud. If the selector lever is put "1i' in - When drivingon hilly, winding roads the transaxlewon't shift intofirst gear until the vehicle is - When towing a trailer,so there is less shifting between going slowly enough. gears bb 99 "a," 1 (First Gear) - When going down a steep hill 2 (Second Gear) This position gives you more power but lower fuel economy. You can use "2" on hills. It can help control your speed as you go down steep mountain roads, but then you would also want to use your brakes off and on. 79