4-Foot Long Adapter Cable PN 444009 J1962 for GMC Truck W/CAT Engine XTruck/ Prolink/ Nexiq USB Link Ver 1. Adapter for use with Nexiq 125032 USB-Link 1 ONLY-Will not work on the 124032 USB Link 2. If you have a CAT engine in a GMC/Chevy chassis, these vehicles are unique and run off an OBDII port that is different than all the other OBDII ports.
