Grand Prix V8-5.3L (2007)
Measuring D Height
4. The D height is measured from a point 30 mm (1.1 in) outboard of the rear brake hose bracket bolt centerline to the bolt centerline of the trailing
arm to the knuckle attachment.
5. Push the rear bumper downward to 38 mm (1.5 in).
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. Refer to Trim Height Specifications.
10. If these measurements are out of specifications, inspect for the following conditions:
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Improper weight distribution
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Collision damage
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Worn or damaged suspension components