double din will i lose on board comp functions

[turbo diesel]

i want to fit a double din stereo into my vectra c, if i do this will i lose the onboard computer function, currenlty have a cd70 navi so will definitely lose the sat nav function

[stripey]

bc still works on mine

[turbo diesel]

how do yo change the time as the settings is one via the origional stereo

[stripey]

I wish I could remember it's a case of random presses of buttons on the steering wheel until I get the right one

just nicked this from a post by @blue estate

Left control on steering wheel.. using the lower button of the 2.. push and hold will get you in the menu.. then use scroll wheel to select date/time
After that im sure you can work it out as i forgot lol