There has been a rash of truck thefts here in fairfield county, and the only trucks taken are macks. Starting this summer, trucks from Stratford, Trumbull , Bridgeport, Norwalk and most recently Stamford have been stolen. All trucks are 1990's macks, mostly RD's and a few DM's. This wednesday a local contractor had 2 late model RD tri-axles stolen right out of his yard early in the morning. Who knows what happening with them, but it seems like all the exporters around here want older Macks.
I guess battery cutoff switches or a secret fuel shutoff or kill switch is cheap insurance. All trucks seems to be stolen from easy access points, where there is only a fence in between a get away.
You could remove the batteries or drain the fuel a thief will take it. All it takes is a truck and a landoll trailer with a winch on it and off it goes.
Locks and theft prevention devices keep the honest people out a crook doesn't care.
That is strange that they are only stealing Mack trucks there must be a big demand overseas for them
maybe you could open your air tanks so the spring brakes lock and cut off the ignition somehow.