GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Tracker - 4WD 🢒 Engine 🢒 Engine Mechanical - 2.5L (LE8) 🢒 Oil Pump Replacement

Removal Procedure
  1. Remove the front engine cover. Refer to Engine Front Cover Replacement .
  2. Remove the lower oil pan. Refer to Lower Oil Pan Replacement .
  3. Remove the upper oil pan. Refer to Upper Oil Pan Replacement .

    4. Object Number: 648576 Size: SH
  4. Loosen the 2 bolts (1) that secure the oil pump chain guide.

    5. Object Number: 648752 Size: SH
  5. Remove the 3 bolts and the oil pump (1).

Installation Procedure

    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.


    Object Number: 648752 Size: SH
  1. Install the oil pump with the chain on the sprocket and secure with the 3 bolts verifying the long bolt (3) is in the proper location.

    2. Tighten
    Tighten the bolts to 27 N·m (19.5 lb ft).


    Object Number: 648576 Size: SH
  2. Push the center of the oil pump chain guide with a force of 0.5-0.6 N (0.11-0.13 lb) and secure the guide with the 2 bolts (1).

    3. Tighten
    Tighten the 2 bolts to 11 N·m (7.5 lb ft).

  3. Install the front engine cover. Refer to Engine Front Cover Replacement .
  4. Install the upper oil pan. Refer to Upper Oil Pan Replacement .
  5. Install the lower oil pan. Refer to Lower Oil Pan Replacement .