Suburban sway on high way



My 2003 4wd sway when I drive over 50mi. I replaced sway bar links and sway bar bushings but it still sways… Nothing is broken, no noise. I don’t know what else to do except to replace rear sway bar bushings but I don’t thing it’s gonna make a difference…


Worn shock absorbers can cause a vehicle to sway when it’s driven at speed.

Especially one as heavy as your Suburban.



Check the ball joints.


I have a trailblazer, and never noticed what you describe when I had broken front and rear swaybar links. I would look elsewhere based on my experience.


Following an inspection of the front suspension, if the shocks are old they’d be next. My '95 Suburban did great with a set of Bilsteins.


If those are the original shocks, they’re due for a replacement. Yes, instability on the highway and in crosswinds is a classic symptom.


Worn shock absorbers, worn or improperly inflated tires, the wrong tires or wheels, are my top 3 suggestions.


Bingo on possibly worn shocks.


Shocks, agree. I’d check the front stabilizer bar bushings, end links and all the steering linkage just for good measure. If the truck hasn’t had an alignment in a few years, that might be due for a check as well. These trucks tend to sag a bit over time and the alignment goes out when that happens.


And check the alignment.
If the front tires are slightly off from each other . . they could be arguing with each other over which one will take the lead.
Are either of the treads worn oddly ?


Everyone has come up with the most likely parts that may be causing your problem.

.Another thing to check, for a wandering steering problem is the intermediate shaft and its U-joint. These can get sloppy and allow for the vehicle to wander.

Have someone rock the steering wheel back and forth as you watch that U-joint. There should be no slopin the joint.
Any slop and it needs to be replaced.



Concur with @Tester and @Mustangman , shocks is where I’d look first. My truck has the same symptom when the shocks are shot. While replacing the shocks/struts, that’s a good time to test for play in other components too.