How do you replace transmission pan gasket 2003 Yukon XL Denali?

To replace the transmission pan gasket on a 2003 Yukon XL Denali, first, ensure the vehicle is on a level surface and securely lift it using jack stands. Drain the Transmission Fluid by removing the pan bolts and allowing the fluid to flow out completely. Remove the old gasket and clean the mating surfaces thoroughly before positioning the new gasket onto the pan. Reinstall the pan, tighten the bolts to the manufacturer's specifications, and refill the transmission with the appropriate fluid.