Measuring the D Dimension
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
Measurement Definition
The D Height: The vertical distance from the bolt head center of rear shock absorber lower attachment (1) to the bottom surface of underbody side rail (2), vertically above the shock bolt head.
The D Height dimension measurement determines the proper rear end ride height. There is no adjustment procedure. Repair may require replacement of suspension parts.
Use the following procedure to check the D height dimension:
- With the vehicle on a flat surface, lift upward on the rear bumper 38 mm (1.59 in).
- Gently remove your hands and allow the vehicle to settle.
- Repeat the jouncing operation 2 more times.
- Measure the vertical distance from the bolt head center of rear shock absorber lower attachment to the bottom surface of underbody side rail, vertically above the shock bolt head.
- Repeat this task for the other side of the vehicle.
- Using your hands, jounce the front of the vehicle downward approximately 38 mm (1.59 in).
- Gently remove your hands and allow the vehicle to settle.
- Repeat the jouncing operation 2 more times.
- Measure the D height dimension.
- The true D height dimension number is the average of the high and the low measurements. Refer to Trim Height Specifications (USA) Trim Height Specifications (Canada) .
- If these measurements are out of specifications, inspect for the following conditions:
- Worn or damaged suspension components
- Collision damage