2005 GMC Sierra 3500

DRIVING 75MPH IN HEAVY HIGHWAY TRAFFIC THE CHECK ENGINE LIGHT CAME ON AND THE TRUCK LOST POWER AND SLOWED TO 40 MPH IN ABOUT 200 YARDS. WE ALMOST GOT HIT BY ALL THE TRAFFIC BEHIND AND AROUND US AS THIS HAPPEN WITHOUT ANY WARNING. WE GOT TO THE SIDE OF THE HWY AND I HAVE A SCANNER AND FOUND 2 CODES P0207 AND P2146. I GOT OUT AND CHECKED THE WIRING TO THE #7 INJECTOR AND DID NOT FIND ANYTHING. PLUGGED IT BACK IN CLEARED CODES ,ENGINE RAN FINE SO START DOWN THE ROAD AGAIN. AFTER 5 MILES IT DID IT AGAIN. IT TOOK ME 5 HOURS TO GO 90 MILES TO GET TO THE NEXT CITY. AT THE HOTEL I FOUND THAT GM HAS A TECH BULLETIN FOR THESE FAULTS AND IT WAS PUBLISHED IN 2008 AT LEAST. SO I WENT TO A DEALER AND WAS TOLD THEY WOULD CHARGE ME FOR THIS REPAIR. I WANT TO KNOW WHY GM DID NOT NOTIFY ME OF THIS KNOWN DEFECT IN 2008 SO I COULD HAVE THE TRUCK REPAIRED IN 2008? THIS DEFECT CAUSES THE TRUCK TO LOOSE SO MUCH POWER THAT IT WILL SLOW IN TRAFFIC WHICH COULD CAUSE AN ACCIDENT. WHY WOULD THIS NOT BE A RECALL THAT GM SHOULD PAY FOR ? GM TB NUMBER IS 05-06-04-047C WHICH TELLS YOU WHAT HAPPENS TO THE TRUCK WHEN THIS DEFECT HAPPENS.