I believe your wheels/hubs are 8-lug so you need to find wheels that fit the specs below:
1994-2002 2500 2WD/4WD Steel Wheels:
Bolt Pattern - 8 on 6.5", 9/16" bolt
Wheel Size - 16" x 6.5"
Offset - 4.75"
2000-2002 2500 2WD/4WD Forged Aluminum Wheels:
Lug Pattern - 8 on 6.5", 9/16" bolt
Rim Size - 16x8"
Offset - 6.25"
Offset will change depending on how much wider you go over the stock width dimension.
Torque Spec: 120-150 ft lbs (163-203 NM) on 8 stud single wheels