FRAME WHERE STEERING BOX IS ATTACHED FAILED. FLEXING FROM NORMAL USE CAUSED THE AREA AROUND THE MOUNTING BOLTS TO CRACK AND WOULD ULTIMATELY SEPARATE THE STEERING BOX FROM THE FRAME IF LEFT UNREPAIRED. REPORTS OF FRAME FAILURES ON 4X4 VERSIONS HAVE BEEN CIRCULATING FOR SOME YEARS DUE TO THE HIGHER STRESS CAUSED BY THE FRONT AX…
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FRAME WHERE STEERING BOX IS ATTACHED FAILED. FLEXING FROM NORMAL USE CAUSED THE AREA AROUND THE MOUNTING BOLTS TO CRACK AND WOULD ULTIMATELY SEPARATE THE STEERING BOX FROM THE FRAME IF LEFT UNREPAIRED. REPORTS OF FRAME FAILURES ON 4X4 VERSIONS HAVE BEEN CIRCULATING FOR SOME YEARS DUE TO THE HIGHER STRESS CAUSED BY THE FRONT AXLE AND THE USE OF OVERSIZED TIRES. IN THIS CASE THE SUBURBAN IS A 1/2 TON 2WD UNIT AND HAS ALWAYS RUN ON FACTORY SIZED TIRES. CRACKS WERE FIRST NOTICED JANUARY 2005 WITH 106744 MI DURING A REPAIR JOB FOR A LOOSE FRAME RIVET. CURRENTLY, DECEMBER 2010 AND 206000 MI., CRACKS HAVE FORMED ON ALL MOUNTING LOCATIONS AND REQUIRES A FRAME REPAIR KIT. REPAIR INCLUDES GRINDING AND WELDING OF CRACKS; AND WELDING ADDITIONAL REENFORCING PLATES TO STRENGTHEN THE AREA.
NHTSA ODI #10370051
Mileage unknown · Oct 12, 1995
Steering
VEHICLES STEERING GEAR BOX BOLT SHEARED FROM FRAME,OCCURED WHILE IN PARKING LOT.CAUSING EXTREME DIFFICULTY IN STEERING CAPABILITIES. TT
THE RECLINER MECHANISM AND THE SEAT FRAME MAY HAVE FOAM AND/OR VINYL VETWEEN THEM, CREATING A "SOFT" JOINT. THIS "SOFT" JOINT RESULTS IN LOWER THAN SPECIFIED BOLT TORQUE WHICH LEADS TO JOINT LOOSENESS, CAUSING BOLT FATIGUE AND EVENTUAL BOLT FAILURE.
Consequence & remedy
Consequence: IF BOLT FAILURE OCCURS TO THE DRIVER'S SEAT, IT WOULD ALLOW THE SEAT BACK TO SUDDENLY RECLINE, AND COULD RESULT IN LOSS OF VEHICLE CONTROL AND A VEHICLE CRASH WITHOUT PRIOR WARNING.
Remedy: DEALERS WILL REMOVE THE FOAM AND/OR VINYL FROM BETWEEN THE RECLINER MECHANISM AND THE SEAT FRAME "SOFT" JOINT AND REPLACE THE RECLINER BOLTS.
SEVERE CORROSION DUE TO ROAD SALT AT THE JOINT OF THE STAMPED STEEL CENTER SECTION AND THE CAST OUTER SECTION CAN CAUSE THE SECTIONS TO SEPARATE.
Consequence & remedy
Consequence: SEPARATION OF THE ROTOR SECTIONS CAN CAUSE LOSS OFBRAKING ABILITY IN THE AFFECTED WHEEL. THIS COULD RESULT IN INCREASED STOPPINGDISTANCE AND/OR LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
Remedy: REPLACE THE FRONT BRAKE ROTORS WITH NEW ROTORS WITH A CORROSION PROTECTION COATING. HOWEVER, IF REPLACEMENT OF BRAKE LININGS ARE NECESSARY, IT WILL BE DONE AT OWNER'S EXPENSE SINCE BRAKE LININGS ARE NORMAL MAINTENANCE ITEMS.
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