The only other vehicle that it happened to me once was a 2015 LTZ Tahoe. ---------- That's funny u say that. I have a cheap radar in my work can and I was going to throw it out the window the other day because it kept beeping. It ended up being a cop and it saved my ass!
Mine wasn't a cheapie unit(it was 150 bucks)
I always check around when it does go off to be sure it is a cop or a false alert though some times it will beep constant(solid multi beep in the k band) if it's from a vehicle with the crash system
Other times it's a spaced beep(beep-beep-beep) that speeds up as the cop gets closer
It also shows on a app for my iPhone as to the band and how close it is
It has saved me from getting a ticket multiple minus one time when I got targeted by a cop who didn't use his radar(jerk just said I was doing the speed he claimed so I paid that ticket and said f it)
New generation radars from Belltronics and Escort are selectable what signal is. I got one, it's very quiet, little even scary, but it does know when cop and when it's just some other thing. Because cops radars are operating on on specific band.
Good to know
I will keep that in mind if I ever replace mine