GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1594334  Size: SH
  1. Remove the engine oil pan. Refer to Oil Pan Replacement.
  2. Rotate the crankshaft so that cylinders 1 and 4 are at top dead center (TDC).
  3. 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.)
  4. Rotate the crankshaft so that cylinders 2 and 3 are at TDC. Remove the piston oil nozzles.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1594334  Size: SH
  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. Tighten the piston oil nozzle bolts to 15 N·m (11 lb ft).
  2. Install the engine oil pan. Refer to Oil Pan Replacement.
  3. Lower the vehicle. Refer to Lifting and Jacking the Vehicle.
  4. Replace the oil filter and fill the engine with new engine oil. Refer to Engine Mechanical Specifications.
  5. Reset the engine oil life monitor. Refer to GM Oil Life System Resetting.