I bought two tires at Walmart in Alamosa, Colorado one day before returning home to Texas. The cost was more than $300. After traveling approximately 80 miles on my homeward trip the tire warning light came on. This light stayed on the rest of my trip home. Several times it flashed like a blinking light. I had checked the air pressure on the tires several times with no problems. I took my car back to the Walmart in Arlington, Texas and after an hours wait I was told the tire sensor was bad. Before Walmart changed the tires there never was anything wrong with the sensors. The tires were changed due to tire tread ware. The service people in Arlington said they had no sensors nor did any of the other stores in the area. When Custmer service for the Alamosa store was contacted they offered no relief and ignored my complaint. The moral of this story is to stay far away from doing business at Walmart tire services.