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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Suspension General Diagnosis) >> Diagnostic Information and Procedures >> Trim Height Inspection >> Z Height Measurement

Z Height Measurement

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

The Z height measurement determines the proper ride height for the front end of the vehicle. The Z height is not adjustable and could require replacement of suspension components.

IMPORTANT:

All dimensions are measured vertical to the ground. Trim heights should be within 12 mm (0.47 in) to be considered correct.

  1. Place hand on the front bumper and jounce the front of the vehicle. Ensure that there is at least 38 mm (1.5 in) of movement while jouncing.
  2. Allow the vehicle to settle into position.
  3. GM4866107Courtesy of GENERAL MOTORS COMPANY

    Measure from the front lower control arm bolt center line (2) down to the lower corner (5) of the steering knuckle (1) in order to obtain the Z height measurement (4).

  4. Repeat the jouncing operation 2 more times for a total of 3 times.
  5. Use the highest and lowest measurements to calculate the average height.
  6. The true Z height dimension number is the average of the highest and lowest measurements. Trim Height Specifications 
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