15196781 5 speed allison. SIERRA 2500 PICKUP 01-05 Transmission; (LH fan shroud), (AT, 5 speed, Allison, opt M74). SIERRA 3500 PICKUP 01-05 Transmission; (LH fan shroud), (AT, 5 speed, Allison, opt M74).
15196781 5 speed allison. SIERRA 2500 PICKUP 01-05 Transmission; (LH fan shroud), (AT, 5 speed, Allison, opt M74). SIERRA 3500 PICKUP 01-05 Transmission; (LH fan shroud), (AT, 5 speed, Allison, opt M74).