Suspension squeaking in a Cavalier can be from suspension parts rubbing together. Check to insure that all of the bushings in the suspension are intact.
The brakes can squeak, the suspension can squeak, the steering can squeak, the wheel hub/bearings can squeak, have a trusted mechanic determine the source of the squeak.
Loose shock absorbers
We changed both and the binding squeak stopped.
The top control arm bushings are likely candidates.
It maybe your suspension that squeaks when ever you go over the speed bumps.
low fluid would cause this or the pump could be going out
usually means the suspension is dry and needs lubrication a good dry lube such as a a spray on molybdinum lube will do the job usually means the suspension is dry and needs lubrication a good dry lube such as a a spray on molybdinum lube will do the job
I just fixed this on my car. All you need to do is spray some DW-40 on the area that is squeaky, and squeak no more
The most important lube points are rubber mounts that serve as an interface between the suspension and the chasis (one behind each wheel). You need a needle to squirt the grease between the rubber mount and chassis. If you do not do this, your suspension will squeak. I had mine done last year and the squeak is back!! There are also zerk fittings at each tie rod behind the front wheels.
Worn suspension parts? Ball joints? check the heat shield underneath the car mine was lost and made it sound bad
It's likely due to wear on the suspension components or the brakes. It's best to have a mechanic inspect the van to determine the exact cause of the squeaking noise.
Check the shocks first they will squeak pretty bad when going out ( dried out seals ). Bushings will squeak but they would have to be pretty bad to do it when just pushing on the front end.