It is usually under the dashboard on the driver's side, should be easy to find.
My Valet switch was installed after purchase so I put it where they suggested/where I wanted. Look on the bottom area of dashboard lower than the steering wheel or the left panel besides the drivers side floorboard.
In the da board
For most vehicles the valet/overide button/switch is located somewhere hidden underneath the stearing wheel area. It is usually hard to spot, but it is there somewhere.
glove box
The valet switch in vehicles looks different depending on the model. It is generally located under the dash or in the glove compartment.
Flip the valet switch next to the floorboard.
glove-box
There is no such part on a Chrysler Sebring.
The factory security system does not have a valet switch.
A 1992 LeSabre wouldn't have a valet switch
it is located on the right side of your steering wheel , on the optional switches panel , along with the head light leveling switch.. note : Valet switch is an optional accessory which is a part of the Remote key less entry system , even if you have a remote key less entry system installed on your your car , there still may not be a valet switch depending on the model of the Key less entry system installed..
My Valet switch looks like a Black rocker switch with Valet wrote on it. Mine is in the arm rest, Cassette holder in my XJ6 1995 model , I do not know what it does though. Paul