Two problems related to tire tread/belt have been reported for the 1998 GMC Sierra 3500. The most recently reported issues are listed below.
At 65mph vehicle started making a thumping sound. When consumer pulled over and started feeling around tire tread was separating. Right rear tire had at least 1,000 more miles to go. Consumer used the spare tire to go find a firestone dealer which they replaced and balanced tire for free. Consumer owns a 1999 motor home with a 98 Chevrolet 3500 chassis with original tires size lt245/75r16 having 34,000 miles on them.
Pe-00020 original equipment on a 1998, GMC, van 3500, tire size lt24575r16. While driving 55 mph on the highway tread on the right rear tire separated.