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D Height Measurement

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The D height dimension measurement determines the proper rear end ride height. There is no adjustment procedure. Repair may require replacement of suspension components.
  1. With the vehicle on a flat surface, lift upward on the rear bumper 1.5" (38 mm).
  2. Gently remove your hands. Allow the vehicle to settle into position.
  3. Repeat the jouncing operation 2 more times for a total of 3 times.
  4. Measure from the front outboard control arm bolt center line to the bottom of the control arm wheel bearing and hub face in order to obtain the D height measurement. See Fig 1.
  5. Push the rear bumper downward to 1.5" (38 mm).
  6. Gently remove your hands. Allow the vehicle to settle into position.
  7. Repeat the jouncing operation 2 more times for a total of 3 times.
  8. Measure the D height dimension.
  9. The true D height dimension number is the average of the high and the low measurements.
  10. If these measurements are out of specifications, inspect for the following conditions:
    • Improper weight distribution.
    • Collision damage.
    • Worn or damaged suspension components.
Fig 1: Obtaining D Height Measurement
G00372182Courtesy of GENERAL MOTORS CORP.