Measuring the Z Dimension

Fig 1: Measuring "Z" Height Dimension

Courtesy of GENERAL MOTORS CORP.

The Z height dimension measurement determines the proper ride height for the front end of the vehicle. There is no adjustment procedure. Repair may require replacement of suspension components.

Use the following procedure to check the Z height dimension:

1. Using your hands, lift the front bumper approximately 38 mm (1.59 in).
2. Gently remove your hands and allow the vehicle to settle.
3. Repeat this operation a total of 3 times.
4. Measure from the bottom surface of the cradle, in line with the ball joint, to the bottom of the ball joint in order to obtain the Z height measurement.
5. Using your hands, jounce the front of the vehicle downward approximately 38 mm (1.59 in).
6. Gently remove your hands and allow the vehicle to settle.
7. Repeat the jouncing operation 2 more times.
8. Measure the Z height dimension.
9. The true Z height dimension number is the average of the high and the low measurements. Refer to Trim Height Specifications .