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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (Suspension System General Diagnosis) >> Diagnostic Information and Procedures >> Trim Height Inspection >> Measuring the P and R Dimension >> Measurement Definitions

Measurement Definitions

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

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

Use the following procedures to measure the P and R dimensions:

  1. Push the front bumper down a minimum of 38 mm (1.59 in) and release. Perform this step three times.
    NOTE:
    • Measure from the center of the wheel well opening to the ground.
    • The left and right P and R height differences should be no more than 10 mm (0.39 in).
  2. Measure and record the trim height per the "Measurement Definitions" above.
  3. Lift the bumper up a minimum of 38 mm (1.59 in) and release. Perform this step three times.
  4. Measure and record the trim height per the "Measurement Definitions" above.
  5. The true P height measurement is the average of the measurements taken in step 2 and 4. Refer to Trim Height Specifications 
  6. Repeat the above steps at the rear of the vehicle for the R heights.