Sierra 2500 4WD V8-6.6L DSL Turbo (2007)
Important: Do not reuse the old idler arm nut.
4. Install the new idler arm nut (3) to the idler arm (1).
Tighten the nut to 62 N.m (46 lb ft).
5. Install the engine shield, if equipped.
6. Adjust the front toe.