I have had Sirius since it became available and I have always loved the pause/rewind/fforwad option offered with the original portable devices. When I first purchased this truck, I was happy to see this option on the MyLink head unit as many of the newer portable units no longer offer this.
Well, the first time I tried to use it, no pause or rewind or anything. I was still learning all the other options in my truck and didn't worry about it. Several weeks later I accidentally hit the pause button and noticed it was working again. It worked fine for a month or so and then some time in July it stopped working again. I have searched several forums for info on fixing the problem but never found anything that worked for me. I was pretty certain a complete reboot would work (disconnecting neg battery terminal for 10 min) but really didn't want to go through re-adding my favorites, renaming the stations, etc. I figured I would fix it when it bothered me enough.
This week I stumbled across the "2014 Tips and Tricks" thread (very long but excellent) and saw someone mentioning ctrl-alt-del equivalent for our MyLink. Press and hold power-menu-home, this will get you to a programmers screen. I did not change anything in these menus but just looked around. When I exited, I noticed the radio did a quick flash and for some reason thought to try pause/play again and it worked perfectly.
I have a neighbor with the same truck and he told me the time shift buttons have never worked. We did the exact same process on his truck and it fixed his time shift issues as well.
Just thought this info might help add to this valuable forum. I do a lot of reading on these pages but never post anything.....