1999 Gmc Sierra 1500 Suspension Problems

After hitting a pothole, your truck started making an abnormal grinding noise from the rear end. The dealer found the rear differential was defective and replaced it, but the same problem happened again. The rear differential has been replaced four times total, and the manufacturer has been notified. This issue started occurring around 186,000 miles. The fix involves replacing the rear differential assembly and potentially identifying why repeated replacements keep failing.

COMING TO A STOP SIGN I APPLIED THE BRAKES AND THEY COMPLETELY FAILED WITHOUT WARNING; NO LIGHTS OR INDICATION FAILURE WAS IMMINENT. THE PEDAL WENT TO THE FLOOR WITH NO RESISTANCE. MANAGED TO TURN ONTO A DIRT SHOULDER AND DOWNSHIFT TO STOP. INSPECTION REVEALED RUSTED THROUGH REAR BRAKE LINE. ALTHOUGH THE DASH BRAKE WARNING LIGHT COMES ON WHILE STARTING THE TRUCK, IT GOES OFF AND GIVES NO INDICATION THE BRAKE FLUID IS LOW. WHILE REPAIRING THE BRAKE LINES IT WAS NOTICED THE FRAME OF THE TRUCK IS EXTREMELY RUSTY AND FLAKING. AFTER WIRE-BRUSHING BY HAND,THE FRAME IS SHOWING CRACKS ON BOTH SIDES, UNDER THE CAB, NEAR THE REAR, RIGHT ABOUT WHERE A CROSSMEMBER IS ATTACHED. THIS VEHICLE IS NO LONGER SAFE TO DRIVE. I AM NOT IMPRESSED WITH GM'S CLAIM THAT THIS WAS A LIGHTER, STRONGER FRAME ON THIS TRUCK. WE HAVE 2 OLDER TRUCKS WITH NOWHERE NEAR THIS MUCH RUST AND NEITHER HAVE CRACKED. THE DESIGN ALLOWS TOO MUCH CRUD TO ACCUMULATE INSIDE THE LIP OF THE FRAME WHERE IT IS ALMOST IMPOSSIBLE TO WASH OUT. *TR

FRAME ROTTED,SUSPENSION ROTTED,FRONT SUSPENSION LOCK TOTALLY ROTTED. *TR

I HAVE SEVERE FRAME RUST TO THE POINT WHERE THE FRAME HAS A CRACK HALFWAY AROUND IT NEAR THE REAR SUSPENSION. THE FACTORY MOUNTED TOW HITCH LITERALLY BROKE COMPLETELY OFF OF THE FRAME DUE TO THE AMOUNT OF RUST THAT WAS BUILT UP AROUND THE WELDS WHILE I WAS TOWING MY CAMPER, LUCKILY I HAD JUST MADE IT HOME FROM A TRIP FROM CAMPING WHEN THIS OCCURRED. I CAN LITERALLY PEEL OFF 1/8" THICK PIECES OF RUST AT A TIME, THE TRUCK IS NO LONGER OPERABLE DUE TO THE SAFETY ASPECT, I HAVE NEVER SEEN RUST LIKE THIS ON ANY VEHICLE, EVEN ONES THAT HAVE BEEN AROUND THE OCEAN AND SALT, AFTER READING MANY COMPLAINTS ABOUT THE SAME ISSUES WITH THESE PARTICULAR MODEL AND YEAR TRUCKS RANGING FROM 1999-CURRENT I HAVE DECIDED TO FILE A COMPLAINT, MAYBE IF YOUR ADMINISTRATION GETS ENOUGH OF THESE COMPLAINTS SOMETHING CAN BE DONE TO CORRECT THE ISSUE AND HOPEFULLY GM WILL DO SOMETHING TO COMPENSATE SO MANY OF THEIR DISAPPOINTED CUSTOMERS OR BETTER YET FIX THE ISSUE, THIS WILL BE THE LAST GM TRUCK I PURCHASE DUE TO THEIR NEGLIGENCE AND AFTER READING 100'S OF COMPLAINTS OF THE SAME ISSUE GM DOESN'T SEEM TO CARE THEY JUST GIVE THE RUN AROUND JUST LIKE WHEN I HAVE HAD PROBLEMS WITH MY VEHICLES IN THE PAST UNDER WARRANTY. *TR

TL*THE CONTACT 1999 GMC SIERRA 1500. WHILE DRIVING 10 MPH THE BRAKES WERE APPLIED BUT THE VEHICLE DID NOT STOP UNTIL REPEATED PRESSURE AND THE EMERGENCY BRAKE WAS APPLIED. THE VEHICLE WAS TAKEN TO AN AUTHORIZED GMC DEALER AND THE LEFT FRONT HUB ASSEMBLY WAS REPLACED. THE FAILURE DID NOT RECUR. THE FAILURE MILEAGE WAS 59,617 AND THE CURRENT MILEAGE WAS 127,000.

TL*THE CONTACT OWNS A 1999 GMC SIERRA 1500. THE CONTACT STATED THAT THE WHEELS LOCKED UP AND THE VEHICLE WOBBLES SEVERELY. THE DEALER CHANGED THE HUB AND THE WHEEL BEARING. THE SPEED AND FAILURE MILEAGE WERE UNKNOWN. THE CURRENT MILEAGE WAS 210,000.

1. WHEN GOING OVER MINOR BUMPS CONSUMER CAN HEAR REAR LEAF SPRINGS HIT AGAINST EACH OTHER, METAL TO METAL SOUND; 2. WHEN ACCELERATING, CONSUMER CAN HEAR A VALVE NOISE. *AK *ML