Either something is wrong with the key or there is something wrong with the switch. You can try to spray some WD-40 or something like it into the switch and wiggle the key to see if you can get it turning. Otherwise you may have to replace the ignition switch.
The manual says to turn on the ignition.
Turn the ignition key on for 10 minutes and it will reset.
Were Under dssh is it
If your ignition will not turn, try turning the steering wheel slightly while you turn the key. Sometimes the steering wheel will get locked in place and doing this will allow the ignition to move again.
Probably the ignition key switch...I have the same problem
Maybe your steering wheel it's keeping the ignition cylinder to turn, so move the steering wheel and at the same time try to turn the key. Maybe you need to replace the ignition cylinder key lock
To reset the change oil light in a 2000 Oldsmobile Intrigue, turn the ignition key to the "ON" position without starting the engine. Press the accelerator pedal three times within five seconds. Then, turn the ignition off and back to the "ON" position to check if the light has reset. If the light is off, the reset is successful.
To reset the oil light in a 2002 Oldsmobile Bravada, first turn the ignition key to the "On" position without starting the engine. Then, press the accelerator pedal three times within five seconds. This should reset the oil change light. Finally, turn off the ignition and restart the vehicle to ensure the light is no longer illuminated.
Remove steering wheel, turn signal (4 screws), and torx holding ignition, reverse to reinstall.
To reset the change engine oil light in a 2003 Oldsmobile Silhouette, first turn the ignition key to the "On" position without starting the engine. Press the gas pedal three times within five seconds. After this, turn the ignition off, and then start the vehicle to ensure the light has reset. If the light remains on, repeat the process.
To replace the ignition cylinder on a 1971 Oldsmobile Cutlass, first disconnect the battery to ensure safety. Remove the steering column cover by unscrewing the screws, then locate the ignition switch and cylinder. Insert the key and turn it to the "On" position, press the release pin to remove the cylinder, and then install the new ignition cylinder by reversing the process. Finally, reattach the steering column cover and reconnect the battery.
I'd call a locksmith. They will be able to tell you the exact problem and how to fix it.