GM Service Manual Online
For 1990-2009 cars only

Special Tools

KM-498-B Oil Pressure Gage

For equivalent regional tools, refer to Special Tools.

Removal Procedure

  1. Open the hood.

  2. Object Number: 1941819  Size: SH
  3. Unscrew the closure bolt (1).
  4. Clean the thread.

Measurement Procedure


    Object Number: 1937132  Size: SH
  1. Attach KM-498-B gage  (2) in combination with KM-232 (1).
  2. Start the engine.
  3. Oil Pressure, Check
  4. At idling speed, the oil pressure must be at least 130 kPa (1.3 bar) and the oil temperature must be >=80°C.

Installation Procedure

  1. Switch off the engine.
  2. Detach KM-498-B gage together with KM-232.
  3. Caution: Refer to Fastener Caution in the Preface section.

  4. Install new closure bolt in the cylinder head and tighten to 15 N·m.
  5. Check the engine oil level.
  6. Close the hood.