[gscoot]

My 99 SLS gave me this warning this morning..."Service suspension system, speed limited to 90". Now since it is only limiting me to 90 MPH how serious can it be, but will of course correct the cause. Any ideas out there? I am making an uneducated guess of a sensor but would love some direction. Thanks in advance!

 

[sjwoodruff]

You'll need to pull codes to find out exactly what is wrong. Could be many things. Pull the codes, and if you need help with deciphering them, post them here and someone will help.

 

[Trench]

I know this is somewhat off topic, so for that I apalogise.

But I was under the impression the SLS only has a standard suspension system, as opposed to active suspension with an STS. If this is indeed the case, how would the car know something is wrong with the suspension? :hmm:

 

[Krashed989]

All cadillacs of the 90's, even the escalade, have active suspension.

 

[Trench]

So all Sevilles from the 90's have active suspension? But from '00 and onward, only the STS does?

 

[mtflight]

So all Sevilles from the 90's have active suspension? But from '00 and onward, only the STS does?

I think the deal is the rear of the car, is self-leveling whether you have sport [active] suspension or not (SLS or STS).

So if something fails in terms of a sensor or compressor, the car feels the need to limit you in case it's off balance or something (rear too low or too high).

Do a search on accessing the onboard diagnostics, and then post back the codes you get from the suspension system. Someone may know the codes and let you know where it's being reported from. It could be a bad connection or something more serious.

But worry-not... it is not a CVRSS strut or anything so expensive since you don't have CVRSS (continuously variable road sensing suspension) aka Sport suspension.

So to summarize... you have "passive struts" and a self-leveling rear-end (adjusts for height with varying payloads).

if you had an STS.... you would have "Active" struts and the self leveling rear-end.