So the OL springs from the OP (Original Poster) are
NOT a GM designed item?
Are these
OL Springs a GM designed item?
I never could find any GM documentation on them.
Are they a:
A. GM RPO?
B. GM Accessory?
C. Aftermarket item? (Designed by someone other than GM)
I have never seen the OP's type of OL spring before.
