GM Service Manual Online
For 1990-2009 cars only

Oil Pan Cleaning and Inspection for Chevrolet Express 1999

  1. Clean the parts in solvent, removing all sludge and varnish.
  2. Clean the old sealer from the sealing surfaces.
  3. Inspect for the following conditions:
  4. • Bent or damaged sealing flanges
    • Damage to the oil pan caused by rocks
    • Loose fit of the oil pan baffle
    • Stripped oil pan drain plug opening threads