(2014) GMC Truck-Sierra 1500 (1999 Up) AT, 4x4, 4.3L AT Transmission - 30K-60K miles Mercury 6L Engine (2017) - <30K

6L Engine (2017) - <30K miles

7L Engine (2017) - 90K-120K miles

3L Engine (2002-2010) - 90K-120K miles

B4204T18) - Engine (2021-2022) - <30K miles

🚘 Model: Promaster 1500

(2014) GMC Truck-Sierra 1500 (1999 Up) AT, 4x4, 4.3L AT Transmission - 30K-60K miles Mercury 6L Engine (2017) - <30KGMC Truck Sierra 1500 (1999 Up) AT, 4x4, 4. 3L AT Transmission (2014) 30K 60K miles This used OEM transmission is listed as its own product for the 30K 60K 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,