Denial of the facts do not change them.
As frustrating as it is, a Tech II is required to program the remotes on these cars. My 2000 Jimmy can be programmed with out it, but not my Bonneville. If you wish to test further, find all of the various instructions for various GM cars and try using them and see if any of them work. A word of caution on that is to be careful using jumpers, as you may damage your electrical system if you jumper something that isn't supposed to be on our cars.