2005 GMC Yukon Xl 1500

A FRIEND OF MINE JUST SHOWED ME A LETTER HE GOT IN THE MAIL THAT IS A RECALL TO FIX THE REDUCED ENGINE POWER CODE THAT SHOWS A THROTTLE BODY NEEDS REPAIRED.. THE LETTER SAYS TO BRING HIS VEHICLE IN IF IT IS A GM OR CHEVY MODEL LESS THAN 10 YEARS OLD AND LESS THAN 150000 MILES AND THEY WILL FIX IT FOR FREE. I CONTACTED GM TO SEE IF MY GMC WAS ON THE LIST AND THEY TOLD ME TO TAKE IT TO A DEALER AND HAVE A DIAGNOSTIC DONE. I HAVE ALREADY HAD ONE DONE AND THE CODES KEEP CHANGING, AND FROM WHAT I HAVE READ THE GM SITE AND OTHER FORUMS GM DOES NOT KNOW WHAT THE PROBLEM AND WILL NOT RECALL IT UNLESS THEY HAVE TO, MY BROTHER IS ALSO A MECHANIC AND HAD IT LOOKED OVER BY OUR COLLEGE MECHANIC SHOP.STILL NO RELIEF, I AM NOT WILLING TO SPEND $5000 AND IT STILL NOT FIXED.. SO I GUESS SINCE SOMETHING LIKE IT IS RECALLED AND I GET INTO AN ACCIDENT BECAUSE IT REDUCES POWER ON THE INTERSTATE DOING 75MPG, ILL CAN TO TAKE LEGAL ACTION? I CAN'T DRIVE IT HALF THE TIME BECAUSE OF THE PROBLEM. IN THE SUMMER IT STARTS WITH REDUCED POWER BECAUSE ITS 90 DEGREES OUTSIDE. *TR