The only thing all these "locks" do is cost time to the would be thief. And as time is of the essence it may deter them. I use a "visible" steering wheel lock (yellow of course) which may cause the thief to think that my car might be a bit of a problem and leave it alone.A Google search on obd locking device returns a whole bunch of devices that block the port mechanically, so the would be thieves can't plug any device into it. All OBD ports use a standard connector, so I would think these devices would work on the C8 as well as any other car.
This is the first one returned: Amazon.com (https://www.amazon.com/Connector-Prevents-Vehicles-Computer-Material/dp/B0BTW92ZPS/ref=asc_df_B0BTW92ZPS/?tag=hyprod-20&linkCode=df0&hvadid=692875362841&hvpos=&hvnetw=g&hvrand=12149099425875128428&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1027067&hvtargid=pla-2281435178298&psc=1&mcid=6349dfb5f55f3375983233e5113085a4&hvocijid=12149099425875128428-B0BTW92ZPS-&hvexpln=73&gad_source=1)
Here's another:
OBD Port Security Anti-theft Lock OBD 2 'The Original OBD Guard', Fast Delivery | eBay
Find many great new & used options and get the best deals for OBD Port Security Anti-theft Lock OBD 2 'The Original OBD Guard', Fast Delivery at the best online prices at eBay! Free shipping for many products!www.ebay.com
I suspect if a thief finds the port locked this way, he's just going to look for an easier target.
Still say a kill button on the power line to the starter solenoid is the best. NO START, NO GO
Steering wheel locks can be from Amazon or most auto part stores