Will a 700r4 transmission fit in a 1999 gmc Yukon?

A 700R4 transmission will not directly fit into a 1999 GMC Yukon without modifications. The 1999 Yukon typically comes with a 4L60E transmission, which has electronic controls, while the 700R4 is a hydraulic transmission. To install a 700R4, you would need to address compatibility issues, including the transmission mount, driveshaft length, and possibly the engine management system.