GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2007 🢒 VUE - AWD 🢒 Suspension 🢒 Suspension General Diagnosis 🢒 Trim Height Inspection

Trim Height Measurement

Trim height is a predetermined measurement relating to vehicle ride height. Incorrect trim heights can cause the vehicle to bottom out over bumps, damage to the suspension components and symptoms similar to wheel alignment problems. Inspect the trim heights when diagnosing suspension concerns and before inspecting the wheel alignment.

Perform the following before measuring the trim heights:

    • Set the tire pressure to the specifications shown on the certification label. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label .
    • Inspect the fuel level. Add additional weight if necessary to simulate a full tank.
    • Empty the passenger and rear compartments, except tor the spare tire.
    • Place the vehicle on a flat and level surface, such as an alignment rack.
    • Verify that all the vehicle doors are securely closed.
    • Verify that the vehicle hood and rear deck lids are securely closed.
    • Determine the existence of installed after market accessories or modifications that could affect trim height measurement.

Important: All dimensions are measured vertical to the ground. Trim height should be within 22.0 mm (0.87 in) either way to be considered correct.

Measuring the Bumper Heights

Use the following procedure to inspect the front bumper height:

  1. Jounce the front and rear of the vehicle a few times and allow the suspension to settle.
  2. The front bumper height measurement is taken outward 390 mm (15.35 in) from the center of the fascia to ground level. Measurements are made from the inner bumper core to ground level. Measure both sides and average the measurements.
  3. Compare the measurement to the front bumper curb height specification. Refer to Trim Height Specifications .
  4. If the measurement is outside of the specified range, replace the front springs. Refer to Strut, Strut Component, and Spring Replacement .
  5. Using your hands, lift the rear bumper approximately 38 mm (1.6 in).
  6. Gently remove your hands and allow the vehicle to lower.
  7. Using your hands, jounce the rear of the vehicle downward approximately 38 mm (1.6 in).
  8. Gently remove your hands and allow the vehicle to rise.
  9. The rear bumper height measurement is taken outward 530 mm (20.86 in) from the center of the fascia to ground level. Measurements are made from the inner bumper core to ground level. Measure both sides and average the measurements.
  10. Compare the measurement to the rear bumper curb height specification. Refer to Trim Height Specifications .
  11. If the measurement is outside of the specified range, replace the rear springs. Refer to Coil Spring Replacement .