THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES THE TECHNICIAN ABOUT VEHICLES WITH DIAGNOSTIC TROUBLE CODE P0602 SET IN THE CHASSIS CONTROL MODULE. TECHNICIAN WILL REMOVE FUSE 19 (F19UA) FROM THE UNDER HOOD FUSE BLOCK AND DISCARD. ON SOME VEHICLES WHEN AN AFTERMARKET OR GM ACCESSORY TRAILER BRAKE CONTROLLER IS INSTALLED, IT MAY BE NOTICED THAT THERE IS NO OUTPUT TO THE 7-WAY TRAILER CONNECTOR IN THE BUMPER FOR THE TRAILER BRAKES. AT THIS TIME TECHNICIAN WILL NEED TO FOLLOW THE LATEST VERSION OF PIT5282.