2019 Ascent, we have owned since June 2019, new off the dealer lot. On my way to dr. appointment and low tire light came on. Went to local Discount Tire and found screw in the tire. No big deal, right? They can fix in no time and we will be on our way. WRONG ! Found all 4 tires to be in dangerous area of low tread depth. As we were surprised to say the least, when asked the technician how this could be possible with under 20K miles he was also surprised but said dealer may have put used tires on the vehicle !!! Has anybody ever heard of such a thing ?