I pulled the 2 plastic lumbar bags out of my C5 seat and sure enough plastic fittings were brittle so I called 2 local dealers for price. Both said $540.00. I said that had to be a mistake in the price list, someone added a Zero or something. Well they said "Thats the price" at which point I saved my breath as I know God will have to revise the Bible price list because who else at GM could do it.!