GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 8.1L 🢒 Piston and Connecting Rod Disassemble

Press-Fit Piston Pin
Object Number: 1310003 Size: SH

Important: 

   • The piston and connecting rod are only serviced as an assembly. If a new piston or connecting rod is required, a complete piston/connecting rod assembly must be used.
   • New connecting rod nuts must be used when the pistons are reinstalled in the engine.

Remove the piston rings (121) from the piston.

Full-Floating Piston Pin

    Object Number: 1366359 Size: SH
  1. Remove the connecting rod bearings (3) from the rod (2) and cap (4).

    2. Object Number: 490763 Size: SH
  2. Using piston ring pliers, remove the piston rings from the piston.

    3. Object Number: 1366364 Size: SH
  3. Rotate the piston pin retaining clips until the ring end gap is positioned in the cutout area (1) of the pin bore.

    4. Object Number: 1366368 Size: SH
  4. Remove the clips starting in the cutout area of the pin bore.

    5. Object Number: 35866 Size: SH
  5. Remove the pin from the piston and connecting rod.
  6. The piston and pin are a matched set and are not to be serviced separately. Mark, sort or organize the piston and matching piston pin.