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Measuring the P and R Dimension

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GM4214805Courtesy of GENERAL MOTORS COMPANY

Measurement Definitions 

PHeight: The vertical distance from the ground to the top of the wheel opening through the center line of the front wheel.

RHeight: The vertical distance from the ground to the top of the wheel opening through the center line of the rear wheel.

Use the following procedures to measure the Pand Rdimensions:

    NOTE:

    The left and right Pand Rheight differences should be no more than 12 mm (47 in).

  1. Push the front bumper down a minimum of 25 mm (1 in), and release. Perform this step three times.
  2. Measure and record the trim height per the "Measurement Definitions" above.
  3. Lift the bumper up a minimum of 25 mm (1 in), and release. Perform this step three times.
  4. Measure and record the trim height per the "Measurement Definitions" above.
  5. The true Pheight measurement is the average of the measurements taken in step 2 & 4. Trim Height Specifications 
  6. Repeat the above steps at the rear of the vehicle for the Rheights.
  7. If the P & Rheights are outside of the specifications, measure the Z & Dheights.