My grandfather sold me his 1999 Yukon it was his daily driver, until about 10 years ago. It has 104,000 miles, 4x4 and normal wear and tear. It starts and runs, 4x4 will not shift, other then that, replaced hoses and radiator cap. I'm wanting to update and change somethinfs and replace old parts. Any ideals on what I can do...I want to eventually rebuild it and make it my daily..anything help is greatly appreciated!