Will rear axle shaft interchange 2wd to 4wd on 94 gmc?

The rear axle shafts for a 1994 GMC are generally not interchangeable between 2WD and 4WD models. This is because the 4WD versions have additional components and different designs to accommodate the transfer case and front axle engagement. Always check specific part numbers and compatibility for your vehicle's configuration before making a swap.