Lumina V6-3.1L VIN J (2000)
Alignment: Description and Operation
Caster Description
Caster is the tilting of the uppermost point of the steering axis either forward or backward from the vertical (viewing from the side of the vehicle). A
backward tilt (at the top) is positive (+). A forward tilt (at the top) is negative (-). Caster influences the directional control of the steering. Caster does
not affect the tire wear. If one wheel has a more positive caster than the other, this condition will cause the vehicle to move or lead toward the side
with the least amount of positive caster.