* Worn-out rear shocks or struts: This is the most common culprit. Sagging is a classic symptom of shocks or struts that have lost their ability to dampen and support the weight of the car.
* Broken or damaged rear springs: Springs can break, rust, or weaken over time, leading to a noticeable sag. This is particularly likely in older cars like a 1992 LeSabre.
* Weight in the trunk: An excessively heavy load permanently stored in the trunk can compress the springs and cause a sag, even after the weight is removed.
* Air suspension issues (if equipped): While less common in a 1992 LeSabre, some models might have had optional air suspension. Leaks or malfunctions in the air system would cause sagging. This is less likely than worn suspension components.
* Rear suspension components: Worn bushings, control arm issues, or other problems in the rear suspension geometry can contribute to sagging. This is less likely to be the sole cause but can exacerbate sagging from other issues.
To diagnose the problem:
1. Visually inspect the rear suspension: Look for any obvious signs of damage to the springs, shocks/struts, or other components. Check for rust, cracks, or leaks.
2. Check for excessive weight in the trunk: Remove any unnecessary items to see if that affects the sag.
3. Bounce test: Gently push down on the rear bumper. If it bounces excessively or takes a long time to settle, it indicates worn shocks or struts.
4. Professional inspection: The best way to accurately diagnose the problem is to take the car to a qualified mechanic for a thorough inspection. They can properly assess the condition of all the suspension components and determine the cause of the sagging.
