You just need to buy the turn signal stock and install it. I can't remember for sure but you might have to extend the cruise control wires down to behind the main junction block. (4 wires total) I did one just the other day but it was an 06 and I had to extend the wires. Took me less then an hour.
Well , I did the deed today , added cc switch and it works! FWIW , Checked with my parts guy and found out multi-function switch is specific to '01 and '02 . Doesn't matter if 1500 ,2500,3500 ,tahoe or suburban ,gas or diesel ,all the same , $385 list , '03+ is $125 . Found mine at the salvage yard for $100. It seems to be plug and play , didn't have to reflash . Now on to high idle and OD lockout . Thanks to all for you help and input.
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