Seat belt help - GM ever change styles?
 

I am trying to install rear seat belts for an extended cab 2002 Silverado. After waiting 4 months on GM backorder from the dealer, I finally got my rear seats belts. Problem is the retractor wont buckle in. It seems to be of a different style. Buckle on the right fits, the new one on the left wont. What are these belts for? They were in a sealed box direct from GM. Don't seem to fit the front either. The part # is 88940125 Belt Kit R/Seat which is supposed to be the correct # for neutral tan.. Thanks for any info.