Flywheel/Flex Plate Torque

Tighten the flywheel bolts to 65 N.m (48 lb ft) on the first pass.
Tighten the flywheel bolts 30 degrees the second pass.
Tighten the flywheel bolts 15 degrees the final pass.

Fig 1: Installing Flywheel & Bolts
Courtesy of GENERAL MOTORS CORP.