Trim Height Measurements

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

Perform the following before measuring the trim heights:

• Set the tire pressures to the pressure shown on the certification label. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label .
• Check the fuel level. Add additional weight if necessary to simulate a full tank of gas. (One U.S. gallon of gasoline weights approximate 6.5 lbs. One liter of gasoline weights 0.70 kg)
• Make sure the passenger and rear compartments are empty, except for the spare tire.
• Make sure the vehicle is on a level surface, such as an alignment rack.
• For vehicles equipped with automatic level control, make sure that the system is functioning properly.
• Make sure that all doors, lift gate/trunk and the hood are securely closed.
• Check for installed after market accessories or modifications that could affect trim height measurements:
  • Larger or smaller than production wheels and tires
  • Lifting or lowering kits
  • Wheel opening flares
  • Ground affects
• Remove the alignment rack floating pins.