Anyone on here knowingly have this package? Looking through GM and Timken's sites, there's about a dozen different rear spring codes and nothing really pinpoints which is for the Sport Suspension.

I've had the front struts replaced on my '08 Cargo van (daily driver also) last month with Monroe Sensatracs and want to upgrade the rear as well. But if I could find spring rates or just more info on the FE3/Sport suspension package that would be great to compare with.

Thanks!

Jeremy