2009 Chevrolet Tahoe Engine Main Bearing Gasket

You need to inspect the seal and identify the part number markings for proper orientation, install the J 41479 cone and bolts onto the rear of the crankshaft, tighten the bolts until snug, install the rear oil seal onto the tapered cone and push the seal to the rear seal bore and the oil seal with the part number markings facing away from the engine and thread the J 41479 threaded rod into the tapered cone until the tool contacts the oil seal. Then you can align the oil seal into the tool, rotate the handle of the tool clockwise until the seal enters the rear cover and bottoms into the cover bore, remove the J 41479 and install the automatic transmission flexplate.

You need to remove the automatic transmission flexplate and remove and discard the crankshaft rear oil seal.