2014 Chevrolet Equinox Wheels Problems

I ASKED MECHANIC TO ROTATE MY TIRES. THEY REPORTED THAT A MAJORITY OF LUG NUTS HAD DEEP CRACKS AND METAL WAS SEPARATING ON THE LUG NUTS. ONE LUG NUT ON FRONT PASSENGER WHEEL WAS FROZEN ON AND SHEARED IN HALF WHEN ATTEMPTED TO REMOVE. I HAD TO TAKE VEHICLE TO CHEVROLET DEALERSHIP. THE DEALER ADVISED ME THAT IF I DROVE THE CAR IN THAT CONDITION IT WOULD BE IMPOSSIBLE TO CHANGE TIRE IF I GOT A FLAT. ON 12/18/2018 I RETURNED TO DEALERSHIP AND THEY RECOMMENDED THAT I CHANGE ALL THE LUG NUTS DUE TO CRACKS. THEY ALSO ADVISED ME THAT THE WRENCH THAT CAME WITH THE CAR WOULD NOT FIT THE BROKEN LUG NUT AND IT WOULD HAVE BEEN IMPOSSIBLE TO CHANGE THE TIRE ON THE ROAD. THE BROKE THE STUD IN DRILLING OUT THE LUG NUT. THE TOTAL BILL CAME TO 6 HOURS LABOR $720, 20 LUG NUTS $179.80, ONE STUD $5.99 PLUS TAX FOR $937 TOTAL. I BELIEVE THEIR IS SAFETY ISSUE WITH THESE LUG NUTS. THEY ARE MADE FROM TWO TYPES OF METAL THAT WITH USE APPEAR TO START TO SEPARATE WITH LARGE CRACKS IN THE CHROME METAL ON THE AXIS WHERE THE TWO METALS APPEAR TO JOIN. IN MY SITUATION IT WOULD HAVE POSED A DEFINITE ROAD HAZARD IF I HAD ATTEMPTED TO REMOVE THE TIRE AND THE BOLT SHEARED IN HALF ALONG THE AXIS OF WHERE THE METALS JOINED. I WOULD HAVE BEEN LEFT IN A SITUATION WHERE IS WAS IMPOSSIBLE TO CHANGE THE TIRE ALONG THE SIDE OF THE ROAD. THE CAR WOULD HAVE HAD TO BE TOWED AS A TOW TRUCK OPERATOR WOULD HAVE FOUND IT IMPOSSIBLE TO CHANGE THE TIRE.

TIRE PRESSURE SENSOR SHOWS LOW PRESSURE IN TIRES , BUT WHEN CHECKED WITH SEVERAL DIFFERENT HAND GAGES AND ADD AIR TO DESIRED PRESSURE LISTED ON DOOR RECOMMENDATION STICKER SENSOR STILL SHOWS THE TIRE PRESSURE IS LISTING LOW BY SEVERAL LBS. IN MOTION ON ROAD - HIGHWAY - CITY ST. / STANDING STILL / RUNNING OR JUST WITH KEY ON MOTOR OFF. (ALWAYS SHOWING LOW AIR PRESSURE IN TIRES -