A friend of mine has to replace the milti-function switch on the turn signal lever. While shopping around for the best price he is getting a large range of prices(from$60 to $350) and all kinds of conflicting information about the part. He has been told that a part that does not specify tilt steering will work and others say it wont. He has Tilt steering.cruise,and all of the other normal functions. Could someone offer some good information on what part he needs and where is the most economical place to purchase it. He has a 1998 Silverado Z71,5.7L k1500 air, ps pb. Thanks for any help.