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I don't know where you live but over here in Texas there is a place called www.Cartoys.com and they do all that. My suggestion is to find a place like that near your house and take your truck there. It will be done professionally and it will have warranty.
I had the boys up here do the power locks when I had my aftermarket Remote start / Alarm installed, so glad I got the power locks.
I had them on my SX and missed having them on the truck.