I've got a Sears Craftsman garage door opener. When I pull my car in, the Sirius radio antenna hits the garage door. Is there a way to make the garage door open further, i.e. lay horizontal when it is open? This was my antenna won't hit the door!

Look at the tracks the door is on, overhead. Does the door have any farther "up" it can go before it stops at the end of the tracks? If so, you might be able to adjust it so it will go up farther. Some doors are already touching the end of the tracks when they are all the way up. Good luck

All door openers have travel and force adjustments. Go up to the unit and look for them.

It does have room to go farther up. I checked for travel and force adjustments - are these the "dials" with 1-8 on them? If so, there are two, and I played with both - neither made a difference. I did not turn the unit off when I changed the dials if that makes a difference.

I would get the model number and try and find the instructions online. There is a process with making those adjustments.
You have to make an adjustment and run the door through a cycle. Then repeat until it is right.

If the motor chain is disengaged, can you manually open the door further?