Replace your leaking transmission lines with our heavy duty, high flow, flexible transmission lines. 2001-2005 For GM LB7 LLY - Duramax Diesel. If you have a 2006 LLY with the 8th Digit of the VIN number being a "2" and the 10th digit of the VIN being a "6", you will need the LBZ-LMM kit, P/N FPE-TL-LBZ-LMM.