I was poking around and researching my rpo codes. I have a 1996 Gmc Suburban 1/2 ton 4x4 The tag in my glove box says my truck is equipped with the f60 option. As I understand it, that option was a heavy duty front coil spring. I however do not have coil springs in the front. Shocks only. I have searched the forums here and elsewhere and come up confused. Any help? Have a few other rpo questions but figured I'd start here.