In the early 90's when the Cummins turbo diesel was put in the square body dodge pick up. The square body dodge pick up changed in 94 to a "big rig" look. The reason for this is that the because the Cummins gave the dodge pick up truck a much needed motor improvent the cummins gave the dodge pickup truck the heavy load hauler look. This style lasted until 03 when the front grill and bumper where changed to a more moderan look. In 07 they changed the grill and bumper.