03 GMC Sierra Remote programing needed

I just bought a 03 GMC Sierra and still have my old remote from my 02 and was wondering if anybody knew the procedure to program the rmote myself. I bought instructions for my altima and did it. And I know it is just a silly act off inserting the key in the ignitions so many times to get it. Any help would be appreacited to avoid the dealer huge fee to make my wife happy to have her own remote!