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D Height Measurement

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. 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.
  1. With the vehicle on a flat surface, lift upward on the rear bumper 38 mm (1.5 in).
  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. Use the J 42854 in order to measure the distance between the lowest point of the ball joint (2) and the center of the front side of the lower control arm mounting bolt (1). See Fig 1.
  5. Manually push the rear of the vehicle down approximately 38 mm (1.5 in), gently remove hands and let the vehicle settle.
  6. Repeat the above step 2 more times for a total of 3 times.
  7. Measure both the right and left sides of the vehicle.
  8. The true D trim height is the average of the high and low measurements. Refer to TRIM HEIGHT SPECIFICATIONS .
Fig 1: Measuring D Height Using J 42854
G00371748Courtesy of GENERAL MOTORS CORP.
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