How do you open the trunk of a 1991 Oldsmobile when the keys are locked in the trunk?

To open the trunk of a 1991 Oldsmobile when the keys are locked inside, you can try using the back seat access if it has a fold-down feature. Alternatively, you might use a slim jim or a coat hanger to manipulate the trunk release mechanism through the gap between the trunk and the rear seats. If these methods fail, consider contacting a locksmith for assistance.