4L is an OEM used assembly sourced from a donor vehicle and checked before inventory
1L Engine (2003) - 120K-150K miles
3L Engine (2004-2010) - 60K-90K miles
9L Engine (2004-2005) - 60K-90K miles
5 speed MT Transmission (2007) - 90K-120K miles
(2007-2008) GMC Truck-Sierra Denali AT, 4x2 AT Transmission - 90K-120K miles 2008 4L is an OEM usedGMC Truck Sierra Denali AT, 4x2 AT Transmission (2007 2008) 90K 120K miles This used OEM transmission is listed as its own product for the 90K 120K miles option, so the price shown belongs to this exact mileage selection. It is a practical replacement choice for buyers who want an OEM style part without dealer new pricing. Please verify fitment before ordering. Match the year, make, model, engine size, drivetrain, VIN notes, transmission type, and