Wiper Cover Kit 22039684
This should be the cover kit number, I'd try to double check it however.
Email or PM Eric Fisher, Turbofish is his name I believe on both boards for confirmation or check at your local dealer if the search function can't confirm it here ( I didn't try that).
Once you get the proper delay switch in there and the new cover it should work just fine.
I wouldn't try the new delay switch without the new cover however, it might fry the delay resistance feature in it with the old non-delay cover, I didn't check the schematics that closely but the wires go to different spots on each cover, I'm sure GM designed them to be interchangeable most likely in case of a mistake but just to be safe put both parts on at the same time. :smile: