GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Oil Pump Replacement

Removal Procedure

    Object Number: 330572 Size: SH
  1. Remove the oil pan. Refer to Oil Pan Replacement .
  2. Remove the oil pump bolt.

    3. Object Number: 330576 Size: SH
  3. Remove the oil pump.

    4. Object Number: 330578 Size: SH
  4. Inspect the pins (oil pump locator) for damage, and replace the pins if required.
  5. Clean and inspect all parts. Refer to Oil Pump Cleaning and Inspection .

Installation Procedure

    Object Number: 330578 Size: SH
  1. Inspect for properly installed pins (oil pump locator).

    2. Object Number: 330576 Size: SH

    Important: Do not reuse the oil pump driveshaft retainer.

    During assembly, install a NEW oil pump driveshaft retainer.

  2. Install the oil pump.
  3. Position the oil pump onto the pins.

    4. Object Number: 330572 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  4. Install the oil pump bolt attaching the oil pump to the rear crankshaft bearing cap.

    5. Tighten
    Tighten the oil pump bolt to 90 N·m (66 lb ft).

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