2003 Chevrolet Silverado 1500 HD engine problems

ENGINE

SEVERAL OF THE EXHAUST MANIFOLD BOLTS HAVE SNAPPED/SHEARED CAUSING EXHAUST LEAKS BETWEEN THE EXHAUST MANIFOLD AND EXHAUST PORT ON THE CYLINDER HEAD. I'M LEARNING THAT THIS IS A COMMON ISSUE THAT HAS GONE UNADDRESSED BY THE MANUFACTURER, BUT IS CLEARLY AN EMISSIONS AND FUNCTIONALITY ISSUE. PLEASE HELP IN HOLDING THE MANUFACTURER ACCOUNTABLE FOR THIS APPARENT MECHANICAL DEFECT. AS OF NOW, THEY OFFER NO ASSISTANCE IN REPAIRING THE ISSUE.

NHTSA complaint #11155467 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

3 OF THE 6 EXHAUST MANIFOLD BOLTS HAVE BROKEN OFF ON LEFT SIDE ,2 ON THE RIGHT SIDE . I NOW HAVE THE EXHAUST TICKING SOUND AND ON OCCASION GET EXHAUST SMELL INSIDE CAB.I NOTICED THE FIRST BROKEN BOLT AT APPROX 55000 MILES. I NOW HAVE 112000 MILES.

NHTSA complaint #10648537 — an unverified report by a vehicle owner.

ENGINE

OK THE PROBLEM I'M ABOUT TO STATE IS A HUGE PROBLEM WITH THE 2003 1500 HDS SINCE THEY WHERE NEW AND CHEVY HAS HAD SEVERAL COMPLAINTS OVER THE YEARS WITH A REFUSAL TO REPAIR. THE THROTTLE ACTUATOR CONTROL IS WHAT THE PEDAL SENSOR TELLS TO MOVE THE THROTTLE BODY. EVERY SO OFTEN (SOMETIMES MULTIPLE TIMES A DAY) THIS MODULE WEIRDS OUT AND PUTS THE TRUCK IN TO REDUCED ENGINE POWER (LIMP MODE) AND WON'T DO OVER 25 MPH WHICH IS VERY HAZARDOUS WHEN TRAVELING FREEWAYS AND TURN PIKES WHERE THE SPEED LIMIT IS HIGH.I MYSELF HAVE BEEN ALMOST RAN OVER BY BIG RIGS BECAUSE MY TRUCK DECIDED TO GO INTO THIS REDUCED ENGINE POWER MODE IN THE MIDDLE OF RUSH HOUR. I MYSELF HAVE BEEN ON THE PHONE MULTIPLE TIMES WITH CHEVROLET CORPORATE WITH THEM TELLING ME THAT I'M SCREWED AND TO GET OVER IT. DON'T GET ME WRONG I LOVE MY TRUCK BUT I JUST WISH CHEVY WOULD STAND BY THEIR VEHICLES INSTEAD OF BLOWING US OFF.

NHTSA complaint #10629944 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

TL* THE CONTACT OWNS 2003 CHEVROLET SILVERADO 1500 HD. THE CONTACT STATED THAT THE VEHICLE WAS MAKING A LOUD NOISE. AFTER INSPECTING THE VEHICLE HE NOTICED THAT FOUR OF THE EXHAUST HEADER MANIFOLD BOLT HEADS WERE MISSING. THE VEHICLE WAS TAKEN TO A DEALER. THE TECHNICIAN DIAGNOSE THAT THE EXHAUST MANIFOLDS AND BOLTS NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAS BEEN NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 108,000.

NHTSA complaint #10616108 — an unverified report by a vehicle owner.

ENGINE

LOST POWER TO ENGINE WHILE DRIVING DOWN THE INTERSTATE HIGHWAY. FAULT ON DASH SHOWED (REDUCED ENGINE POWER). PULLED TO SHOULDER OF HIGHWAY AND TRIED TO RESTART ENGINE TO NO AVAIL. AFTER SITTING FOR ABOUT 5 MINUTES ENGINE STARTED AND CHECK ENGINE LIGHT STAYED ON FOR A FEW DAYS. SINCE THAT TIME I HAVE REPLACED THE THROTTLE POSITION SENSOR AND HAVE STILL BEEN HAVING THE SAME PROBLEM FOR THE PAST 2 YEARS. IT WILL SOMETIMES DRIVE FOR A FEW DAYS WITHOUT ANY PROBLEM, BUT SOME DAYS IT WILL OCCUR 10 OR MORE TIMES IN A DAY. I HAVE BEEN ON SEVERAL WEBSITES ONLY TO SEE SEVERAL PEOPLE ARE EXPERIENCING THE SAME PROBLEM EVEN ON DIFFERENT MODELS AND YEAR VEHICLE'S. THIS COULD AND MAY WELL HAVE CAUSED DEATHLY AUTO ACCIDENTS. I HAVE LOOKED FOR A RECALL ON THIS PROBLEM AND COULD NOT FIND ONE. MY QUESTION IS, "ARE THERE ANY PLANS TO RECALL EFFECTED VEHICLES FOR THE ISSUE OF "REDUCED ENGINE POWER?" PLEASE CHECK INTO THIS ASAP. THANK YOU FOR YOUR TIME AND CONCERN.

NHTSA complaint #10544977 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

GM 2004 1500HD TRUCK: GM CAN'T FIX THE REDUCE ENGINE POWER PROBLEM. THE CODE THAT THEY CAN'T FIX KEEPS SAYING ITS THE THROTTLE BODY SENSOR. I HAVE HAD GM DEALER TRY TO FIX WHAT THIS CODE IS TELLING THEM BUT STILL HAVE THE PROBLEM. BASED OFF RESEARCH THIS IS A MAJOR PROBLEM WITH MANY OTHER GM TRUCK OWNERS. WHEN THIS SENSOR LIGHT COMES ON & DISPLAYS REDUCE ENGINE POWER THE TRUCK BASICALLY SHUTS DOWN. I'VE HAD THIS HAPPEN RUNNING IN THE LEFT LANE OF A MAJOR HWY AND ALMOST GOT RUN OVER. PLEASE HAVE GM DO SOMETHING ABOUT THIS PROBLEM BECAUSE I'M SURE IF IT HASN'T KILLED ANYONE YET IT WILL. ONLY THING DIFFERENT BETWEEN THE TOYOTA PROBLEM AND THE GM PROBLEM IS ONE SPEEDS UP AND THE OTHER SLOWS DOWN TO 20MPH. AS I HAVE STATED THIS PROBLEM HAPPENS A LOT SO DON'T PAY ATTENTION TO THE INCIDENT DATE I HAD TO ENTER.

NHTSA complaint #10402737 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

AUGUST 2007 PURCHASED 2003 CHEVROLET SILVERADO 41,000 MILES FOUND OUT AFTER PURCHASE MANIFOLD BOLTS ON DRIVERS SIDE AND PASSENGER SIDE WERE BROKE. TOOK VEHICLE INTO CHEVROLET DEALER HAD LEFT SIDE MANIFOLD REPLACED AND BOUGHT UP GRADE BOLTS FROM GM. AS OF FEBRUARY 2, 2011 MANIFOLD BOLTS ARE BREAKING AGAIN CAUSING MANIFOLD LEAK WHICH IS A VIOLATION OF EMISSIONS AND ALSO CAN CAUSE A FIRE HAZARD IF THIS PROBLEM ISN'T ADDRESSED THAT GM HAS FAULTY MANIFOLDS SOMEONE MAY END UP SERIOUSLY INJURED. THE TRUCK NOW HAS 72,000 MILES ON IT DEALERSHIP WAS NOTIFIED OF THE SECOND PROBLEM AND NO HELP WAS GIVEN.

NHTSA complaint #10381934 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

2003 CHEVROLET SILVERADO EXHAUST MANIFOLD BOLT BROKE. LESS THAN 100K MILES. COSTLY REPAIR TO HAVE THE BOLT DRILLED OUT AND REPLACE ALL BOLTS AND GASKET. EXHAUST LEAKS AND CAN HEAR TICKING NOISE FOR THE FIRST 10 MINUTES OR SO AFTER THE VEHICLE IS STARTED. ALSO CAUSES MY CHECK ENGINE LIGHT TO COME ON, PULLING ERROR CODES FOR OXYGEN SENSORS.

NHTSA complaint #10378072 — an unverified report by a vehicle owner.

ENGINE AND ENGINE COOLING

I WAS DRIVING ALONG THE ROAD THIS PAST WINTER AND A CAR SUDDENLY STOPPED IN FRONT OF ME...I HAD ABSOLUTELY NO BRAKES AND THANKFULLLY WAS ABLE TO GET AROUND THE CAR INTO THE OTHER LANE WITHOUT INJURY. THE BRAKE LINES WERE ALL CORRODED AND NEEDED TO BE REPLACED. THIS COULD HAVE BEEN A SERIOUS ACCIDENT HAD THERE BEEN VEHICLES IN THE OTHER LANE. IN ADDITION TO THIS THE SPEEDOMETER OFTEN STOPS WORKING AND IS REGISTERING AT THE WRONG SPEED.

NHTSA complaint #10324969 — an unverified report by a vehicle owner.