Premium ride suspension

[quickmedic1]

I have a 2004 Tahoe LT with a tow package. I have replaced the rear springs with a set of Eiback 2" drops. There info states if you have autoride you will need to install the supplied sensor links for correct adjustment. BUT..if you have the premium ride like I do you need to replace the rear shocks or it wont lower. I installed the springs and it sat the same height as the original springs. I changed the shocks to Gabriel max comforts and it now sits lower.

 

What is the deal with the rear factory shocks?  More pressure? Do they have an inner spring or what? I noticed they are also super heavy.

 

Thanks for any info

John

 

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Posting this just in case someone here knows the answer.