I have a 2006 Chevy Silverado LS regular cab with power locks and manual windows. I'm not sure if I have the keyless entry option or not as the truck is my work truck and was given to me without the key fob. I tried to program an old key fob from a 99 Silverado and I go through all the steps and it confirms everything as explained in the instructionsbut the fob still does not work. Can anyone tell me with it confirming the programing does this mean I have the option or a website I can use to find out if I even have this option? Or do I needto use a different fob?Thanks for any help.