My neighbors 03 3500 SRW 6 speed just turned 135k and change the last few days. 95% towing miles. Same brakes,changed gear oil/diff fliuds ONCE,same brakes all around,first set of tires went 90k. Fuel and air filters,Never been aligned,one Tsb powersteering hose,one reflash for check gauges. Tows 3 horse trailer. Another friend with 60k plus 2500 48re and air and fuel filters,one tsb powersteering hose,one lumbar replaced in drivers seat. No other maintance other then tire rotations. Tows a cargo trailer 95% of the time. Mine only has 12,500k. Tsb for powersteering hose.