From my understanding, which is limited so take it with a big grain or salt and take someone more knowledgeable on the subject word over mine.
The radio's are interchangeable.
They did change the bezel shape between early and later commanders. I think 2009 and later, are all rectangles, same shape for all radios.
The earlier Commanders and Grand Cherokee, had a funky shaped bezel that had two nobs on either side extend as half-circles outside of the rectangle. If you have this shaped bezel, that could be a problem.
My understanding of the CAN Bus and Lock-Pick is that all OEM radios will work with the CAN bus fine, interchangeable, no extras needed. Devices like the Lock-Pic are for fooling the can bus to watch video while moving (defeat a safety feature) or installing aftermarket radios that do NOT talk to the CAN bus. There are 3rd party devices that talk to the can bus and then signal the aftermarket radio to do what the message that came over the CAN bus indicated.
The problem you can have with CAN bus and switching to different OEM radios is the extras units/modules the OEM radio communicates with over the CAN Bus. These are things like the factory amplifier (for the premium sound system), the multi-disc CD unit or DVD player, hands free radio kit, etc. Even then, that would only be if you swap in a radio that does have the features for those items, you're talking about upgrading to a higher end radio than you have, so I doubt the higher end radio will NOT have a feature that your lower end radio does have.
Keep in mind, brand new radios will come disabled from the Dealer. You will have to go to the dealership and have them use their Witech tool connected to a corporate database to enable the radio. So you can install it yourself, but it won't turn on till you take it to the dealer. If you purchase the radio used, it will already be enabled and will work as soon as you install it.
Enabling the Siruis/XM/Satellite Radio, is done through the satellite company. Switching radios will come with a new receiver with a new ID. Any subscription or free trials will be associated with the ID of the old radio. If you have a subscription, it should just be a phone call, maybe a small switching fee. The free weekends, they work for all receivers, so if you don't have subscription you will still get the free weekend like everyone else despite getting a new radio. The only drawback is the free trials they give from time to time, they have started to drum up business to give new free trials to people that have had their car for years and the original free trial was up. They won't switch over the free trial to a new radio, it is only offered to the ID of the original radio.
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