So, I'm not really sure exactly why this is happening or whether or not it is a handling or vehicle meta problem. Then again maybe it's just the model. I've seen it happen before but figured it was on purpose since I've seen real patrol cars sag in the rear from equipment weight. Though it's sagging in the rear more than I've ever seen in GTA and real life. lol I've tried replacing both my handling and meta files with the vanilla and it's not fixed it. Love everything you guys do for the community and love the mod. My life wouldn't be complete without it. Thanks for the help fellers.

I love this mod too. I'm not so experienced , but it came to my mind that you might have changed the wrong carvariations file. I learned today that there are several. 

It looks like the default sheriff2 hang if you know what I mean. 

I hope this can be of help. 

I didn't know there are several. I've never changed it though or edited it. (that I know of) I have edited the vehicles.meta recently. I changed to this Tahoe from hurks  HQ FPIU and never replace the meta I had to edit, and noticed the sag. After replacing the edited vehicles.met with a vanilla one, it still sags.  I've since replaced the sagging Tahoe with another Tahoe and it had no sag. I've even put a cvpi in the slot and it doesn't sag. A real head scratcher, well for me at least.