Installing A.M. Keyless on a 2004 Blazer originally not keyless equipped.

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So Now the same dealer that said it had keyless on the phone supposably, Says the blazer didnt come with that option. Also had no wheel lock, So even tied up it got pretty squiggly one time on the dolly in rush afterwork traffic, Was prettttyyy crazy

So I was wondering about these kind of kits....
http://www.gcustoms.com/product_info...=keyless entry

It says universal, Seems like its pretty simple to me.
I was thinking to grab a couple opinions on it,
Thought had just crossed my mind to do a quick search on it...