Buy the kit it comes complete with the all the bits you need, make sure you choose your head unit 1st as you will need to order the patch lead when you order the fitting kit.
A couple of how-to's I done may very well help you.
How-to remove head
How to install aftermarket unit
I've just upgraded my Kenwood DNX9210BT to the Kenwood DNX7250DAB
A couple of how-to's I done may very well help you.
How-to remove head
How to install aftermarket unit
I've just upgraded my Kenwood DNX9210BT to the Kenwood DNX7250DAB
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.