GM Service Manual Online
For 1990-2009 cars only
  1. Fully extend the strut assembly with the wheel unsupported in order to expose the seal cover area for inspection.
  2. Look for signs of leaks in the seal cover area.
  3. A slight trace of fluid is NOT cause for replacement. The seal permits some seepage to lubricate the piston rod. There is a built-in reserve to allow for the seepage.
  4. A leaking strut assembly can easily be found because there will be fluid around the seal cover and an excessive amount of fluid on the strut. A leaking strut assembly must be replaced.