GMC 15286715 Propeller Shaft Assembly

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Loosen the left front wheel lug nuts.

On 4WD models, the front driveshaft should be checked as well, including for leakage around the sleeve yoke. The joints of the front driveaxles should be checked for looseness, and for grease or oil leakage from the rubber boots and axle flanges.

After making reference marks, you should proceed to remove the rear universal joint bolts and straps. Use a screwdriver or prybar to prevent the driveshaft from turning during this step. If applicable, remove the support bearing mounting bolts.

Raise the vehicle and place it securely on jackstands.

To complete the removal and installation of the front driveshaft on 4WD models, you should remove the bolts and straps from the differential flange and the bolts securing the driveshaft to the transfer case flange. Push the driveshaft to the rear to separate it from the differential flange, then lower and pull it out of the transfer case. When installing, attach the front end of the shaft to the differential companion flange and the rear to the transfer case flange, ensuring the marks are aligned. Install the straps and bolts, tightening them to the specified torque. Finally, install the skid plate if applicable.

The splined yoke on the front end of the rear driveshaft allows it to slide back and forth during vehicle operation.