The G30 cable needs to be cut shorter to work with the K series pedal. On the actual cable are two crimped steel "beads." One is at the end of the cable, the second, a larger rectangular bead, is about 4" - 5" from the end. We cut the "extra" 4-5" off the end and insert the larger rectangular bead into the new pedal. Red arrow shows bead... it must be cut in half.

GMC offered "2500" vans for upfitters for years that had few observable differences from the half ton cousins.