GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Disconnect the 12V negative battery cable in the engine compartment. Refer to Battery Negative Cable Disconnection and Connection.
  2. Disconnect the 36V hybrid generator battery system. Refer to Hybrid Battery Service Disconnect/Connect.
  3. Remove the air cleaner assembly. Refer to Hybrid Battery Service Disconnect/Connect.
  4. Remove the right inner fender liner. Refer to Front Wheelhouse Liner Replacement.
  5. Remove the engine oil pan. Refer to Oil Pan Replacement.
  6. Rotate the crankshaft so that Cylinders 1 and 4 are at top dead center (TDC).

  7. Object Number: 1594334  Size: SH
  8. Remove the piston oil nozzles from Cylinders 1 and 4 using a 3/8 inch wobble extension drive with a 6 mm hex drive bit. Remove the piston oil nozzles. (Crankshaft removed for illustrative purposes.)
  9. Rotate the crankshaft so that Cylinders 2 and 3 are at TDC. Remove the piston oil nozzles.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.

  1. Install new piston oil nozzles. Turn the extension by hand to ensure that the threads are aligned. Use a long screwdriver to ensure that the nozzle does not rotate and make sure that the locating pin is properly indexed in its hole.
  2. Tighten
    Tighten the piston oil nozzle bolts to 15 N·m (11 lb ft).

  3. Install the engine oil pan. Refer to Oil Pan Replacement.
  4. Install the right inner fender liner. Refer to Front Wheelhouse Liner Replacement.
  5. Lower the vehicle. Refer to Lifting and Jacking the Vehicle.
  6. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  7. Connect the 36V hybrid generator battery system. Refer to Hybrid Battery Service Disconnect/Connect.
  8. Connect the 12V negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  9. Replace the oil filter and fill the engine with new engine oil. Refer to Engine Mechanical Specifications.
  10. Reset the engine oil life monitor. Refer to GM Oil Life System Resetting.