The homelink is part of a package and is not standard on the V6 (as unbelievably ridiculous as that is).
There is really no trick. What is the problem?
Try a few things first (I assume you are using a newer opener with rolling codes)
Hold both of the outside buttons on the homelink until it flashes rapidly. This clears all the codes. Then program one button by holding down the homelink button and then the RF remote until the homelink flashes rapidly. Then test the homelink by pressing the newly programmed button. The LED should be solid. If not, start over. Now press the "learn" button on the opener (you should have like 30 seconds after pressing the button). Go back to the car and press and hold the programmed button until the light on the opener flashes. You should be done!
Hope that helps.