So i have a 2001 Silverado LS its got power locks windows and mirrors, its has the AU0 RPO code in the glovebox. I bought it used without a key fob about 6 months ago. I bought a new key fob from autozone which says it is compatible with the year model. I have followed the instruction in which you hold unlock and turn the key I know I am doing this right. When I do this i the locks do not cycle i just hear what sounds like relays clicking. I have also tried holding back the high beam selector which DOES cycle the locks but after I hold LOCK UNLCOK on the transmitter it still will not program to the truck. super frustrating LOL.