1999 Pontiac Montana Owner's Manual - Page 141

yellowblue AUTOMATIC OVERDRIVE (D): This position is for normal driving. If you need more power for passing, and you're: THIRD (3): This position is also used for normal driving, but it offers more power and lower fuel economy than AUTOMATIC OVERDRIVE (D). Here are some times you might choose THIRD (3) instead of AUTOMATIC OVERDRIVE (D): D Going less than 35 mph (55 km/h), push your accelerator pedal about halfway down. accelerator all the way down. D Going about 35 mph (55 km/h) or more, push the You'll shift down to the next gear and have more power. D When driving on hilly, winding roads. D When towing a trailer (so there is less shifting between gears). D When going down a steep hill. NOTICE: If your vehicle seems to start up rather slowly, or if it seems not to shift gears as you go faster, something may be wrong with a transaxle system sensor. If you drive very far that way, your vehicle can be damaged. So, if this happens, have your vehicle serviced right away. Until then, you can use SECOND (2) when you are driving less than 35 mph (55 km/h) and AUTOMATIC OVERDRIVE (D) for higher speeds. SECOND (2): This position gives you more power, but lower fuel economy. You can use SECOND (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. 2-45