Overview:  This guide covers removal and reinstallation of both the Harmonic Balancer and Crankshaft Position Sensor on a Series II/Series III 3800.   Tools Required:  24mm socket for the crank bolt, 19mm socket for the lug nuts, 18mm socket for the subframe bolts, 15mm/belt tool for the belts, 13mm socket for the crank position sensor bolts, 10mm socket for the flexplate inspection cover, harmonic balancer puller, OEM 27296 GM 3800 bolt kit, screwdriver, various extensions, torque wrench, bre