I saw your post about looking for a new car. Ed Wallace is a HIGHLY respected man with the crazy knowledge of ALL the major dealerships in the DFW area. He has fabulous reviews and has his own set of recommondations for what dealerships to buy from depending on what brand car you want. He has been in this busines for a LOOOOOOONNNG time and I've bought all my cars through all of the dealerships he's dealt with....
https://www.insideautomotive.com/purchase.htm
That is a VERY resourceful page!
I'll throw in my suggestions.....
if you're shopping used..i would most def look at Classic Chevrolet of Grapevine (off 114/121 ish by the Main Event) They always have a great inventory from what I've seen (we bought DH's car from them).
If you're shopping new, it would depend on what dealership but my cousin just bought a Toyota from Rene Isip's Toyota of Lewisville (just last weekend) and had a fairly decent experience with them and they gave her top notch customer service! She said the finance team was also fabulous!
GL and take your time (if time allows) and do lots of research...