This is for factory fitted satnav, as fitted to the top of the range Omega Elites, not an after market system. I started off with a GID - Graphics Information Device, then fitted a CID - Colour Information Device as soon as I could get one from eBay. The CID big advantage over the GID is that it has a proper map display, The GID was fitted as standard to the Elite model, with very few opting for the £400 upgrade to the CID.

You'll also need a Sat Nav Aerial and some extra wire and connectors.

By far the easiest method of acquiring the above, and the method I used, was to visit a breakers year and remove everything from a donor vehicle. I got all of mine from a 2002 Omega Elite that had been written off. I also stripped out the the loom behind the dash, the BOSE audio amplifier, the rear speakers and rear electric blind and the Park Pilot system.

The other method is www.eBay.co.uk . Don’t forget to also check www.eBay.de as the Omega is very popular in Germany with Sat Nav parts are more frequently found on the German site. It’s always worth checking with the seller before placing a bid that they are happy to ship to the UK.  Don't worry about the display language or Sat Nav voice as both of these are selectable from menus. If you want a Vauxhall Logo rather than an Opel one then this can be changed by Tech2.

One important thing to note is that the screens and unit are coded to each other, and as far as I’m aware they cannot be decoded once they have been separated from each other. They are not coded to the car, but to each other! So you'll need to get a screen and head unit from the same car, or a screen and head unit from different cars that have been de-coded prior to removal from the donor cars, or a brand new screen and head unit that have never been fitted and are still in delivery mode. Basically when you fit the screen/unit if "Display Safe" is flashing on the screen they're in delivery mode and can be married with Tech2. If "Display Safe" is on constantly  the unit is married to another system and cannot be use.

Once fitted, with the exception of screens and head units that came from the same car then they will need marrying together by a Vauxhall dealer using Tech2 before they can be fully used. My local dealer charged by £50 +VAT to do this.

First job is to remove the old head unit and info display. I bought a set of double DIN removal keys here which made the job much easier from here http://www.siocommunications.co.uk/Shopping/view_product.php?product=PC5-110 

To wire a GID in place of the supplied MID you need disconnect from the 32 way connector Pins 9,10,11. Don’t cut them as two of these wires are useful if you want to connect a CID. 

Then add the following connections

The grey connector at the back of the MID display can be dismantled by cutting the cable tie and then pressing in the tabs at the bottom of the connector. The cover then slides off to give access to the connections.  

To wire the CID you need an extra connector which you will need to source. This is a separate 12 way connector as shown at  the top of this page. Again eBay’s a favourite, try searching for “Stecker” which is German for Connector. I’ve seen a few people selling both 32 way connecters and the additional 12 way connector for the CID on eBay.de. Apparently a Vectra CD-Changer-cable P/N 9196108 has the correct connector and can be used but I’ve not tried that.

 The extra CID connector wires as follows

Then it’s a case of connecting a Sat Nav Aerial, re-assembling everything, having your local Vauxhall dealer Tech2 the screen and head unit to each other. The wiper stalk is also different, in that the three buttons that were used for the Check Control/Computer are no longer needed. It'll work with the old one, but for completeness I fitted the correct one from an Elite which also added Variable Intermittent Wipers.

Please feel free to email me with any comment, suggestions or queries. Nick at Paraphor dot com