GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 7.8L 🢒 Oil Pump Disassemble
  1. Remove the driven gear and shaft from the oil pump body.
  2. Remove the cotter pin from the oil pump.
  3. Remove the oil relief valve from the oil pump.
  4. Remove the oil pump drive gear using a suitable puller.
  5. Remove the drive gear.