I installed min for less than 100 bucks off ebay - I got the roller type switch as it looked better than the other switches. It was super easy to rip all apart and put back together. Left the seatbelts intact and had it done in a couple hours (being generous) I live in MN and these heat up faster than the heater does and I seldom use them above the 1st setting. it really helps round out the heat in the cab.
I own a JEEP, if your car does not say JEEP on it then it's not a JEEP! Your have a (fill in some OTHER mfr. here)!
I knew they wouldn't understand but sheesh!