GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1996 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Oil Pump Replacement

Removal Procedure
  1. Remove the oil pan. Refer to Oil Pan Replacement .

    2. Object Number: 4548 Size: SH
  2. Remove the oil pump to crankshaft main bearing cap bolt.

    3. Object Number: 4549 Size: SH
  3. Remove the oil pump.
  4. Inspect the oil pump pickup tube for looseness.
  5. If the tube is loose in the oil pump body, replace it. A loose pickup tube can result in an air leak and loss of oil pressure.

Installation Procedure

    Object Number: 4549 Size: SH
  1. Align the slot in the oil pump shaft with the tang on the distributor shaft.
  2. Slide the oil pump into place. No gasket is used.

    3. Object Number: 4548 Size: SH
  3. Install the oil pump to crankshaft main bearing cap bolt.

    4. Tighten
    Tighten the oil pump to crankshaft main bearing cap bolt to 90 N·m (66 lb ft).

  4. Install the oil pan. Refer to Oil Pan Replacement .