NHTSA Complaint #10040875 — 2004 TAHOE 36WTB

I JUST PURCHASED A GMC 2004 YUKON XL 4 BY 4 SUV MADE BY GENERAL MOTORS. MSRP $48,485. IT WAS EQUIPED WITH STABILITRAK REAR DIFFERENTIAL, HEAVY DUTY TRAILERING EQUIPMENT, 17 INCH POLISHED CAST ALUMINUM WHEELS, P265/70R17 ALS WOL BRIDGESTONE TIRES. THE GVW RATING IS 7,200 LBS AND A REAR AXLE RATIO OF 3.73. THE MAX TRAILER WEIGHT IS 7200 LBS.STABILTRAK USES SENSORS TO READ SPEED, BRAKE PRESSURE,ACCELERATION, STEERING WHEEL POSITION, TURNING RATE, AND HAS THE COMPUTER ADJUST ENGINE SPEED AND BRAKE PRESSURE TO ANY INIVIDUAL WHEEL. MY PROBLEM IS THIS. THE SPARE TIRE IS A FIRESTONE 16 INCH TIRE [DIFFERENT RIM SIZE, DIFFERENCE TIRE PATTERN]. SINCE THE 4 BY 4 GOES AUTOMATICALLY INTO 4 WHEEL DRIVE DEPENDING ON ROAD CONDITIONS, A SMALLER TIRE IS EXREMELY DANGEROUS WITH POSSIBLE INJURY OR DEATH. THIS IS A HEAVY SUV WITH A HIGH TRAILERING CAPACITY AND SHOULD NEVER HAVE DIFFERENT SIZE, DIFFERENT MAKE, AND DIFFERENT THREAD DESIGNS FOR THE TIRES. THE OWNERS MANUAL WARNS AGAIST USING DIFFERENT TIRE SIZES WHEN IN 4 WHEEL DRIVE CLAIMING TRANSMISSION PROBLEMS WILL DEVELOP WITH POSSIBLE INJURY OR DEATH. SINCE THE OPTIONS ON THIS GMC SUV HAVE THE COMPUTER DECIDE TO GO FROM 2 WHEEL DRIVE TO 4 WHEEL DRIVE, I REQUEST A RECALL FOR THE GMC SUV YUKON XL WITH THESE OPTIONS. THE RECALL SHOULD HAVE THE DEALER REPLACE THE 16 INCH FIRESTONE SPARE TIRE WITH A 17 INCH BRIDGESTONE TIRE THAT IS THE SAME MODEL AS THE 4 DRIVE WHEELS. A STEEL 17 INCH RIM IS ALSO REQUIRED. SINCE THE SPARE TIRE IS MOUNTED UNDER THE CAR FRAME, IT WAS NOT NOTICED ON DELIVERY OF THIS NEW 2004 GMC YUKON XL SUV.