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I don't think AutoRide has anything to do with the spring rates. However, with the Automatic Level Control, I believe the spring rate is slightly lower (softer) than those for non-ALC-equipped models.
^^^ THIS!!! ^^^
I meant to tag you in that first one. By chance, do you happen to have the spring rate info between the factory springs?
No, I've never been able to nail that down. Spent many, many hours looking to no avail. Even the aftermarket ones are hard to locate but I have seen some before, just forget who!
There's a 3 letter code on the springs. Compare them from truck to truck.
Where would one find this 3 letter code? I have only seen some colored paint markings on my 05 Yukon.