I personally can't answer your particular question though I Have installed the gauge pack on my C5 and it's nice to have!
I would suggest you contact
CLaurenson@ChevyPartsPlus.com and Cary Laurenson is your contact person. Let him know what you have and I'm sure he can direct you with the proper part for your car. The install is basic and Plug & Play so I would think it's just a matter of unplugging the harness in the console that runs along the inside of it by the gear shift and putting the gauge harness in between the two original plugs and running the gauge connector to the back of the pack and plugging it in. I'm sure they have these packs for Canadian cars and they should be set up to read in metric. Just plug & play and roll, but contact Cary. He's real good about getting back to you and is very knowledgeable.