I purchased GM's front and rear splash guards and after a little over 500 miles, I have come to the conclusion that they are COMPLETELY WORTHLESS!
The front of the rear quarterpanels looks like a freaking shotgun blast hit them. Even with the factory rock guard. The paint isn't damaged, just the rock guard plastic sheeting.
I'm EXTREMELY careful where I drive and if I see gravel on the roadway, I'll move to the other lane till I pass it.
Is there a company out there that makes better splash guards that stick out a little farther, hang a little lower, and look just as good as the GM ones?