How much would it cost to add cruise control to a 2002 Impala?

I recently bought a 2002 Chevy Impala but it doesn't have cruise control. Will a dealership still install one? how much would it cost? would it be better to go to a dealership or just a mechanic? I live in New York City, any suggestions?How much would it cost to add cruise control to a 2002 Impala?
Probably less than $250.00 including parts. JCWhitney.com has them and most any mechanic can install them. I have installed several back in the day.How much would it cost to add cruise control to a 2002 Impala?
I highly doubt that anyone could install one, its not just a plug and play type deal. if for some reason a dealer can install one it will cost you about 4,000 like I said it will not be worth it. But yes always go to the dealership for matters liek that incase you have electrical problems in the future.