(Idler arms/Pitman arms/Tie rods) Known to be the weak link on the Duramax diesel truck, and should be inspected or replaced often. The oversize tires we all love kill these parts quickly and should be replaced every 15-30 thousand miles depending on driving conditions---doing so will help maximize tire life and safety. Dmaxstore has tested and selected high quality replacements and upgrades for our members to save money on these "must-have" parts.