On Sat, 23 Jun 2018 04:14:02 GMT, Gary
m wrote:

replying to JasonW, Gary wrote:
Went to Sears Parts website in model 139.66380 referenced by Jim above.
Was looking for a replacement remote. They could only offer a rolling-code
converter for $70. Fortunately was able to get the remote working. Any other
issues, I think, will mean buying a whole new opener...

There are not really that many types of GDO remotes. You just need to
figure out which one you have.