GM 12550237
Disc

And for servicing and repairing the Clutch Disc, the first step would be to remove the manual transmission. Then remove the clutch Pressure Plate bolts and then try to remove the clutch Pressure Plate and driven disc from the dowel pins on the Flywheel. For installation, apply the clutch alignment arbor (J33169) to align the clutch driven plate with the clutch Pilot Bearing. Mount the clutch Pressure Plate and driven plate on the dowel pins on the Flywheel , and make sure they align because the gray paint spot on the Pressure Plate is to be aimed at x on the Flywheel . Tighten clutch Pressure Plate bolts , first finger tight and subsequently to 20 nm (15 ft. Lbs.). Lastly, using the torque angle meter (J36660-A), while reattaching the clutch pressure, rotate the tension of bolts 45 degrees before fitting the manual transmission. It is worth noting that whenever changing the clutch driven plate, the truck's engine Flywheel must be replaced with the clutch Pressure Plate as a combination.

The first step for Clutch Disc service starts with manual transmission removal followed by clutch Pressure Plate bolt removal. Remove the clutch Pressure Plate and driven disc and extract them from the Flywheel's dowel pins. Replace the engine Flywheel and clutch Pressure Plate as one coordinated assembly during clutch driven plate replacement operations. Set the clutch Pressure Plate and driven plate onto the dowel pins of the Flywheel where the gray paint spot on the Pressure Plate matches the x on the Flywheel . Use the clutch alignment arbor (J 33169) to align the clutch driven plate to the clutch Pilot Bearing. Install the clutch Pressure Plate bolts finger tight before beginning the procedure. Apply torque of 20 nm (15 ft. Lbs.) to the clutch Pressure Plate bolts before using the torque angle meter (J 36660-A) to turn each bolt another 45°. Finally, reinstall the manual transmission.