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I don't even know what kind I have, but I purchased them at the local auto parts store and I paid friggen $48 for them. I was so shocked when he told me how much I owed him for a pair of wiper blades!! They are the curved ones with no metal "spine"
Stop by your local GM dealer and get the OEM rubber inserts for around $7 each, not the entire blade assembly. That's what I did.
Be sure to get the real GM ones with the part numbers, not whatever the dealer has in stock.
Two different part numbers but the actual parts are identical if you get just the refills. Complete blade assemblies are side-specific, the driver side assembly has the little wingy thingy.