I have tweaked 03/04 odometer readings with an LPT1 interface and the PonyProg software,
In
viewtopic.php?p=516699#p516699 jolt posted some links, one of them is to
https://www.tachosoftonline.com/ which seems to offer a tool to convert from odometer readings to the hex code needed to put into the EPROM That tool says that the 03-05 Vibes used a 93c46 EPROM, and 2009 used a 93c56 EPROM. Info you find for the 93c46 data locations might not apply to the 09+ 93c56
All that being said, I don't know where in the 93c46 the data for English/Metric selection is.
If you by a 2010 Vibe, you'd probably have to find a specialty shop, as GM dealership support for Vibes is getting increasingly hard to find. If you buy a 2014 Matrix, Toyota could help do the units switchover for you, although I don't know if they would need to send the cluster somewhere or they could do it any at random toyota dealership
I know
https://www.specmo.com/services/conversions can do it for you if you send them the cluster, they say they will also swap out the gauge faces to match the units. I don't know what that costs. They are just one shop, there must be others that do that kind of work, and I have no connection with specmo so I am not offering any endorsement of them
Sorry to not be of any actual help, but if you do it, please let us know what 's involved