GMC, front crankshaft seal replacement in Zevulun

GMC, front crankshaft seal replacement in Zevulun.
It is required to replace the front crankshaft seal in the presence of leaks in this element. The process of replacing a component includes removing the engine timing protection, removing the timing belt, removing the drive toothed pulley and removing the front crankshaft seal. Installation of a new component is carried out in the reverse order.