When lifting a GM pickup, Suburban, Tahoe, Yukon, or Yukon XL 1500 with Autotrac from 4" to 6", a dual cardan driveshaft replacement is necessary. The Rough Country driveshaft may also be necessary for non-Autotrac vehicles regularly drivin in 4WD over 35MPH. This driveshaft is a good choice to provide the longest lasting driveshaft and to eliminate any vibration issues.