I noticed up on start up a warning light comes on & display says brake system failure 62 MPH then gs away. I have been reading numerous other reviews online that they are experiencing the same issue. 2nd problem is when I bought the vehicle I noticed numerous oil spots on the tailgate, I asked a GM representative & they said it was road grime, but I noticed the rear pinon is leaking, so it’s been leaking since I bought the truck & the dealership either dsn’t know it’s a known issue or they didn’t want to come out & say it.