All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
That is the wiper delay module. GM part # 15598496. Gm is currently out of stock but my locator shows many dealers that have them. Have you tried bypassing the module and plugging the two connectors together. I believe you can and it should work except for the delay portion.