I did my Geine last week. (That sounds porno...LOL ) It worked fine. Start with the garage door open. Push and hold the 3 buttons in the truck I think until they flash, you might check the owners manual on that.
Then go push the button on the opener motor and run back to the truck and push and hold the button in the truck that you wnat it to be. Hold the truck button until the door closes then let go. You're done! It took about 7 to 10 seconds for mine to find my code.
Just don't let go of the button in the truck until the door moves.