Sears garage door openers and accessories start with 139. so I assume that is model 139.53683.

I can't cross reference that to the Chamberlain modles. chamberlain makes the Sears opers.

I might be able to from the remote model number.

Also Do either of remotes or reciever have ERTL, ((())), Security+ or other markings on it?

This list a number of different kits. Find one that looks similar to yours. Select it and download the instructions.

Thank you for your response. The 2 remotes have 139.53681B on them. Yes, they have Security+ as well. You mentioned a 'list' to check, where do I find this 'list'?

Sorry I copied and forgot to paste.

But based on your answer you probably have one of these kits.

http://www.aaaremotes.com/secrlichgado.html

http://www.aaaremotes.com/lifgardoorop5.html

Note you kit might have more or less remotes. And the remotes might have more than 1 button (to control other openers).

But none of tht affects the installtion or programing.