While driving on a highway the truck started to shake, we immediately pulled into a garage and had the tires checked out. It was determined that both the front passenger side tire and the rear tire, same side, had a tread separation. These tires had 18,000 miles on them. They should have lasted a lot longer. We were fortunate we were not traveling on an interstate at a high rate of speed.

- Ocala, FL, USA

The american general 245/70/17 tires on 2009 wore out down to the tires wear bars 2/32 at 16,000miles there was heavy edge wear chuncking pieces of tread. Tire were rotated every 5000 and alignment checked. Took to local Chevy dealer and they found a recall or technical service bulletin from american tire and all four tires were replaced free of charge. However they were replaced with american General Grabber H/T which also have to soft of a rubber compound and are wearing out quickly the truck has 26150 miles on it now and the new tires are down to 7/32 with less than 10000 miles on them. Start putting Bridgestone tires back on the trucks Chevrolet.

- Virginia Beach, VA, USA

The contact owns 2009 Chevrolet Silverado equipped with Goodyear Wrangler tires, line size (235/80/R17) dot pjab35hv4109. The contact stated that while driving approximately 60 mph the rear driver side tire blew out. The contact stopped the vehicle on the shoulder of the road. The tire was replaced. The contact inspected the other tires and noticed bubbles on the front and rear passenger side tires. The contact had all four tires replaced. The manufacturer was made aware of the failure stated the tires would be inspected by an engineer. The approximate failure mileage was 27,000...updated 10/22/12 the consumer inspected the rear tires and discovered the inside dual had failed. Three of the six tires on the ambulance proved to be defective with air bulges on them. Updated 10/22/12

- Ruidoso, NM, USA

The contact owns a 2009 Chevrolet Silverado 2500 hd with green diamond icelander tires (na), size 245/75/R16. The contact stated that he noticed that the driver side rear, front and the passenger front tires were out of round. The vehicle was taken to the dealer where they confirmed the failure and advised having the three tires replaced. The tires were replaced with the same brand and line of the previous tires. Once the tires were installed, the front passenger tire experienced tread separation. The vehicle was taken to the dealer again where they replaced all four tires. The manufacturer was contacted but had not responded to the contact. The failure mileage was approximately 1,200.

- Rita, WV, USA