Z Height Measurement
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For vehicles equipped with torsion bars, check the Z height before performing the alignment.
The Z height dimension measurement determines the proper ride height for the front end of the vehicle. Vehicles equipped with torsion bars use adjust arms in order to adjust the Z height dimension. Vehicles without torsion bars have no adjustment and could require replacement of suspension components.
- Jounce the front suspension of the vehicle by pushing the vehicle down and lifting up.
- Allow the vehicle to settle and take a measurement.
- Point A is the contact surface of the steering knuckle for the levels.
- Set the top edge of the level on the reference surface of the steering knuckle (C) and extend the level directly under the front end of the front attachment bolt of the lower control arm (A).
- While keeping the level in contact with the knuckle reference surface, adjust the level up/down until the bubble indicates it is horizontally level.
- Measure the distance between the center of the bolt and the top of the level for your first measurement
- Keep the top edge of the level on the reference surface of the steering knuckle (C) and move the level directly under the rear end of the rear attachment bolt of the lower control arm (B).
- Measure the distance between the center of the bolt and the top of the level for your second measurement.
- Average the measurements between the step 6 and step 8.
- Record the measurement.
NOTE:
Perform steps 3-9 for both sides of the vehicle.