My dad's 06 GT has it, I don't know if it's a deluxe but it's got leather seat.
There is a button above the radio that shuts it off labeled Trac Control of i remember right.
I have seen in Rangers newer than that (around 2010) that shutting the button off doesn't completely turn it off, you have to push and hold the button (10 seconds maybe?) and of course it resets every time the key is off.
Weren't you talking about buying a tuner in a different thread? That will also permanently turn it off as well.
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2003 Ford Mustang GT
1995 Ford F150 XLT 4x4
1968 Mercury Cougar