In the case I sited earlier, we got the chip on the way to Palm Springs one summer.
It wasn't all that bad, but with the heat out there by the time we got to the in-law's place it had become a crack that almost went from top to bottom.
I did get a chip repaired on my daughter's Suburban that she'd bought out in Palm Springs when they were here visiting from Japan. They ended up moving to Virginia and left the 'burb with me to ship back east. It almost disappeared but not quite.
You can just make out the shadow on the sun screen at the end of the scale in the picture.