2004 GMC Yukon Denali

IN MY 2004 YUKON DENALI THE STEERING WHEEL PUMP WENT UP. THE VEHICLE WAS PURCHASED ON MAY 8, 2004 AND TO MY DISCOVERY THE FAILURE OCCURED ON JUNE 26, 2004. WHILE DRIVING I NOTICED A LOUD HUMMING SOUND COMING FROM THE TRUCK. IT WAS NOTICEABLE WHEN I DEPRESSED THE GAS PETAL AND ALSO WHILE TURNING THE STEERING WHEEL. I CONTACTED ONSTAR TO PERFORM A DIAGNOSTIC OF THE VEHICLE IN HOPES THEY COULD DETERMINE THE PROBLEM. ONSTAR WAS ABLE TO ASSESS MY TRUCK AND INFORMED ME THAT NOTHING WAS MALFUNCTIONED ELECTRICALLY WHICH INDICATED A MANUAL DYSFUNCTION. FOR A MATTER OF THIS MAGNITUDE TO HAVE GONE WRONG IN SUCH A SHORT PERIOD OF TIME, LEADS ONE TO BELIEVE THAT THE DEALERSHIP SOLD ME A LEMON OR DID NOT PERFORM A THOROUGH ASSESSMENT OF THE VEHICLE PRIOR TO SELLING IT TO ME. ON THE NEXT BUSINESS DAY, JUNE 28, 2004, I DROVE MY TRUCK INTO THE SERVICE CENTER, ANDERSON AUTOMOTIVE OF HUNT VALLEY MARYLAND FROM WHICH IT WAS PURCHASED. TO BEGIN WITH, WHEN I RESEARCHED AND CHOOSE THE SUV OF MY LIKING, I WENT TO ANDERSON AUTOMOTIVE OF HUNT VALLEY AND TEST DROVE THE TRUCK I WANTED. THE STOCK NUMBER OF THE TEST DRIVEN VEHICLE WAS 4J269973. THE DEALER ASSURED ME THAT THE VEHICLE WAS IN EXCELLENT CONDITION AND WOULD NOT BE SOLD TO ANYONE AND WAS ON HOLD FOR ME. AT THE TIME OF PURCHASE, THE STOCK NUMBER OF THE VEHICLE SOLD TO ME WAS 4J195367 (A CLEAR MISMATCH FROM THE ONE I TEST DROVE). MY CONCERN IS THAT THIS DEALER INTENTIONALLY SWITCHED AND SOLD TO ME A FIFTY THOUSAND DOLLAR DEFECTIVE VEHICLE. THIS INCIDENT HAS RAISED RED FLAGS IN MY TRUST WITH THIS DEALERSHIP AND THEIR CONSUMER PRACTICES. I AM SO DISTURBED BY THIS EXPERIENCE AND HOW THE CLEAR DECEPTIVENESS IN SWITCHED VEHICLES OCCURRED, THAT IF NECESSARY, MY NEXT STEP WILL BE TO CONTACT THE DMVA (DEALER COMPLIANCE) AS WELL AS THE STATE'S ATTORNEY GENERAL FOR FURTHER INVESTIGATION INTO THIS MATTER.*AK