I don’t have the gr iii so I can’t tell you if it’s possible. I also didn’t manage to find any information regarding this on RU-vid, so I am guessing so far it’s a no, haha!
@@SkylerLetsDoThis Yes, I also didn't find anything about using it on a GRIII so thought maybe you tried 😅 Thanks anyway! I'll comment here if I find anything.
It’s extremely easy, each seat only has 4 nuts holding them. Just pull the plastic covers off and you will see them. I am 5ft 9in, I sleep straight with no issue at all with the rear seats up.