Just got back from the dealer for my recall on the air bag while there I ask the to look at my overdrive which works on and off for 5 to 15 sec. The perfomed diag and came up witht he shift interlock switch RR for 497.00 where is it and how may I replace it. is it inside teh CC on the drivers side? My over drive button is sticky and the over drive light, if there is one does not come on.