Peace, mercy, and blessings of God be upon you. May God make your times good. To begin with: May God honor you, communicate publicly, privately, or via WhatsApp. The warranty is a installation warranty. And if there is a problem, you get your money back immediately. Available with me: 4L66E gearbox. It fits Tahoe, Yukon, and Avalanche. And if you want to install it on a Caprice or Lumina, change the "dire" and the "watermelon" and it will fit. The gearbox is very clean, its oil is clean, and its shifts are smooth. Also available: Cam or crank sensor for the same model. I'm not sure because I bought it a long time ago and forgot what it was for. Selling to the highest bidder. And the sale is easy and reasonable. May God write good for me and for you.