Had my truck in for its first oil change. Right after that I started hearing a tapping noise under the front drivers side wheel well. Called the dealer and he faxed me a TSB 10-19-2. Issue: Some 6.7 diesel equiped vehicles may exibit a ticking noise after an oil change. It is refered to as Typewriter Noise because of its random thyping sounds on a mechanical typewriter. Customers may report that when near a building or drive through window that this noise can be heard inside the cab. Service Info: Basically normal condition. No action is to be taken and is not Warrantable. Do not change the viscosity of the reccommended oil as this will not fix the noise.