First press and hold the button for ~2 seconds, after the system says "Ready" say "Bluetooth", after the system says "Bluetooth ready" then say "Pair", then follow the instructions. The commands are listed in the owner's manual.
Thanks for the tips. I got it paired now. My owners manual doesn't have the commands because the truck never came with bluetooth (2008). Can someone post the procedure to add #'s and use the bluetooth commands? Thanks.