It's probably a problem with your catalytic converter.
If your Oldsmobile Alero will not shift into overdrive, the transmission may have froze up. Check the fluid levels to determine if you are low on fluid.
The 2000 Oldsmobile Alero shift solenoid is located on the top of the transmission. The shift solenoid can be access by removing the inside shifter console.
SAME PROBLEM WITH AN 04 ALERO. NOW THAT COOD WEATHER IS HERE IT TAKES A LONG TIME, DOWN THE ROAD, BEFORE IT WILL SHIFT INTO OVERDRIVE ? ? ?
A 1992 Oldsmobile may not shift out of park because the transmission is stuck. Check to transmission fluid to ensure it is at the proper level.
If you can run the shifter down through the positions it may have broken loose at the transmission . If the shifter doesn't move at all it may be a problem in the steering column < unless it is a floor shifter >. If it is a floor shift model I'd start by checking the shifter release button to see if it is broken.
There is a staple on the front of the gearshift just below the knob, remove it and lift the shift knob.
Has this just started.?, Does it shift rough or not at all.? Have you looked under the car to check for oil leaks.? Have you looked under the hood for any oil spillage..? Have you physically checked the amount of oil you have in the transmission.? Go to a transmission shop and they will do these things free for you and possible tell you what has to be done, the cost and how long to repair...
If the transmission on a 1999 Chevy 4x4 will not shift into high gear, there could be a problem with the shift solenoid. There could also be a problem with a broken belt inside the transmission.
The main problem with any vehicle that will not shift out of gear deals with the transmission. This is a problem where the transmission may need to be replaced to fix it.
Transmission problem, you have to replace or get it repaired.
Might be a problem with the brake/transmission interlock switch
A 93 Deville that wont shift from second gear has most likely got an internal transmission problem. Unless the linkage is mis-adjusted, then the problem is onside of the transmission.