2003 GMC Sierra Powertrain & Transmission Problems

I WAS PARKED ON A SLOPED DRIVEWAY (ABOUT 10 - 15 DEGREES). I STARTED THE ENGINE, STEPPED ON THE BRAKE PEDAL AND TOOK THE CAR OUT OF PARK INTO DRIVE. BRAKE PEDAL WAS NORMAL. I STARTED TO ROLL FORWARD AND WHEN I PUSHED THE BRAKE PEDAL THE CAR DID NOT SLOW. I SLAMMED THE BRAKE PEDAL AND IT WENT ALL THE WAY TO THE FLOOR. AT THIS POINT I WENT OFF THE END OF THE DRIVEWAY ONTO A 45 DEGREE DOWNWARD SLOPED LAWN; THEN INTO A WOODED AREA AT THE TOP OF A RAVINE. I SLAMMED INTO A TREE. THE CAR WAS JUDGED A TOTAL LOSS BY MY INSURANCE COMPANY. I DID NOT GET A BRAKE WARNING LIGHT. THE AIRBAGS DID NOT DEPLOY. THE CAR WAS SERVICED AT A UNION PARK GMC (WILMINGTON, DE) TWO DAYS PRIOR. INCLUDING BRAKE INSPECTION. CAUSE OF BRAKE FAILURE WAS DETERMINED TO BE RUPTURED BRAKE LINE. BOTH FRONT AND REAR BRAKES WERE FAILED. *TR

TL* THE CONTACT OWNS A 2003 GMC SIERRA 1500 HD. THE CONTACT STATED THAT WHILE ENTERING THE DRIVEWAY AT VARIOUS SPEEDS, THE VEHICLE FAILED TO RESPOND TO DECELERATION ATTEMPTS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CONTACTED ABOUT THE FAILURE. THE FAILURE MILEAGE WAS 120,000.

TRANSFER CASE MADE A GRINDING NOISE. NOTICE CUT ON OUTSIDE OF THE CASE. *TR

TL* THE CONTACT OWNS A 2003 GMC SIERRA. THE CONTACT STATED THAT THE VEHICLE FAILED TO ACCELERATE WHEN THE ACCELERATOR WAS DEPRESSED. THE VEHICLE WAS TOWED TO THE DEALER AND THE MANUFACTURER WAS CONTACTED, BUT THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 78,000 AND THE CURRENT MILEAGE WAS 79,059.

TL*THE CONTACT OWNS A 2003 GMC SIERRA. WHILE THE CONTACT WAS EXAMINING HIS VEHICLE HE NOTICED THAT THERE WAS OIL DRIPPING FROM THE TRANSFER CASE UNDER THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE CONTACT WAS INFORMED THAT A COVER SHOULD BE PUT ON THE TRANSFER CASE TO STOP THE LEAKING. THE VEHICLE WAS SERVICED BY THE DEALER AND THERE WERE NO PRIOR WARNINGS. THE CURRENT AND FAILURE MILEAGES WERE 76000.

LOSS OF 3RD GEAR. TRIES TO SHIFT INTO 3RD GEAR AND JUST RED LINE'S. *TR

TL* THE CONTACT OWNS A 2003 GMC SIERRA 2500. WHILE DRIVING AT ANY SPEED, THE VEHICLE STALLED, LOST POWER, AND THE SERVICE ENGINE LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO WAS UNABLE TO DIAGNOSE THE FAILURE. THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND ADVISED THE CONTACT TO TAKE THE VEHICLE TO A LOCAL DEALER FOR DIAGNOSTIC TESTING. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 180,000.

TRANSFER CASE BURT UP DUE TO FAULTY CLIP DESIGN, SNAP RING WORE INTO CASE, VERY POOR CASE DESIGN. AN AFTERMARKET MANUFACTURER HAS COME UP WITH A BETTER BACK HALF OF THE CASE AND UPGRADED PUMP TO FIX THIS PROBLEM.*CN

I ENTERED THE TRUCK STEPPED ON THE CLUTCH PEDAL, SHIFTED INTO REVERSE AND STARTED TO EASE THE CLUTCH OUT WHEN THE PEDAL WENT ALL THE WAY TO THE FLOOR BOARD. THE VEHICLE IMMEDIATELY CHIRPED THE BACK TIRES AT NO MORE THAN 950 R.P.M.'S AND BEGAN TO IMMEDIATELY GO BACKWARDS TOWARDS ANOTHER VEHICLE IN MY DRIVEWAY. I QUICKLY STEPPED ONTO THE BRAKE AND STALLED THE VEHICLE TO A STOP. I THEN PROCEEDED TO LOOK UNDER THE DASH TO SEE WHAT HAD "POPPED" AND FOUND THAT I COULD SEE LIGHT THROUGHOUT THE FIREWALL, AS I MOVED THE PEDAL UP AND DOWN. I OPENED THE HOOD TO FIND THAT THE BLACK PLASTIC FLANGE THAT THE CLUTCH MASTER CYLINDER MOUNTS TO HAD BROKEN OR SHATTERED RELEASING THE MASTER CYLINDER THEREFORE, COMPLETELY DISENGAGING THE CLUTCH. HAD I NOT BEEN QUICK TO REACT, I WOULD HAVE STRUCK ANOTHER VEHICLE IN THE SIDE CAUSING EXTENSIVE DAMAGE. HAD I BEEN IN 1ST GEAR WHEN THE FAILURE OCCURRED I WOULD HAVE LUNGED FOWARD AT THE END OF MY DRIVEWAY AND OFF A 10' LEDGE STRAIGHT DOWN INTO MY NEIGHBORS BACKYARD, RESULTING IN PERSONAL AND PROPERTY DAMAGE. THIS VEHICLE HAS ONLY APPROX 104 THOUSAND MILES. THIS WAS A POOR DESIGN AND HAS FAILED IN A VERY DANGEROUS MANNER. THIS NEEDS TO BE RECALLED IMMEDIATELY. *TR

4 WHEEL DRIVE TRANSMISSION WILL SHIFT FROM 2 WHEEL TO 4 WHEEL LOW WHILE DRIVING. SOMETIMES IT WILL SHIFT TO NEUTRAL. THIS CAN BE VERY DANGEROUS. YOU BASICALLY DON'T HAVE THE CONTROL OF THE VEHICLE THAT YOU THOUGHT YOU HAD. *JB

I HAVE BEEN HAVING TROUBLE WITH MY FOUR WHEEL DRIVE. THE ENGINE SEEMS TO BOG DOWN LIKE I AM PULLING SOMETHING. TOOK IT IN TO GET LOOKED AT AND THE REPAIRMAN HAD TO REPLACE A PART SAYING THAT IT WAS AUTOMATICALLY KICKING IN AND OUT. HE FIXED IT AND IT WAS FINE FOR ABOUT 6 MONTHS AND NOW IT IS DOING IT AGAIN. YOU CAN EVEN HEAR IT IN THE ENGINE, IT SOUNDS LIKE IT DOWN SHIFTS TO PULL SOMETHING. *NM

THE TRANSMISSION CLUNKS WHEN SHIFTING FROM 2ND - 3 RD AND AT TIMES THE ENGINE WILL REV AND FINALLY IT WILL TAKE OFF, THIS HAS CAUSED AN ISSUE WHEN GOING THROUGH AN INTERSECTION. THE DEALERSHIP ATTEMPTED FOUR REPAIRS AND IT IS NOT FIXED. THE ISSUE STARTED WHEN THE VEHICLE HAD 6K MILES ON IT AND IT IS GETTING WORSE. THE SPEEDOMETER IS SPORADIC IN THAT IT WILL SHOW SPEED REDUCTION/INCREASE IN SEGMENTS - AS IF IT WERE STICKING. THE ERRONEOUS SPEED INDICATION CAUSES AN ISSUE WHEN GOING TOO SLOW OR TOO FAST IN TRAFFIC. *NM

I HAVE A 2003 GMC SIERRA PICKUP.MY PROBLEM IS THE TRANSMISSION DOES NOT WORK PROPERLY.I HAD 150 MILES ON THE VEHICLE WHEN THE TRANS BLEW,NOW A CLUNKLING NOISE EVERY TIME THE VEHICLE SHIFTS.GM CALLS THIS A DOWNSHIFT CLUNK NOISE AND HAS ISSUED A TSB REQUESTING DEALERS NOT TO ATTEMPT REPAIR.THIS IS A LOUD CLUNK WHICH SLAMS INTO THE DIFFERENTIAL.I HAVE CONTACTED GM TO NO AVAIL ETC RUNAROUND. IS THERE ANY PLACE TO GET HELP FOR ME AND POSSIBLY MANY OTHERS?*AK

AFTER DRIVING OVER ABOUT 40 MILES AT HIGHWAY SPEED THE TRANSMISSION WILL BEGIN SLIPPPING IN OD. RPM SLOWLY CLIMBS TO ABOUT 3200 (NORMALLY 2100 AT HIGHWAY SPEED) WITH NO CHANGE IN VEHICLE SPEED, AND EVENTUALLY THE 'TRANSMISSION HIGH TEMPERATURE' WARNING APPEARS ON THE DASHBOARD DISPLAY. SHIFTING TO NEUTRAL AND ALLOWING THE ENGINE TO IDLE FOR ABOUT 20 SECONDS AND THEN RETURNING TO DRIVE WILL TEMPORARILY CLEAR THE PROBLEM, BUT IT SOMETIMES RETURNS.*AK

I DRIVE A 2003 GMC SIERRA AND THERE IS A TRANSMISSION PROBLEM IT MAKES THE DRIVING VERY DANGEROUS ESPECIALLY AT HIGHWAY. SPEED. THE VEHICLE CANNOT STAY STRAIT IT EITHER PULLS TO THE LEFT OR TO THE RIGHT. THE FEEL OF THE VEHICLE ISN'T RIGHT LIKE IF ITS DOG TRACKING. THERE ARE CLONKING AND TICKING SOUNDS COMING FROM THE TRANSMISSION JUST FROM SHIFTING FROM DRIVE TO REVERSE,REVERSE TO DRIVE...PARK. WHILE DRIVING WHEN ENGAGING THE PASSING GEAR SOMETIMES YOU HEAR THAT CLONKING SOUND LIKE IF THERE WAS A SLACK IN THE TRANSMISSION. I HAD THIS VEHICLE SINCE JULY 2004 AND SINCE THEN I'VE BEEN TO THE DEALERSHIP A NUMBER OF TIMES EVERYTIME THEY SAID THAT EVERYTHING WAS OK AND SHOWED ME PAPERWORK STATING FROM GM CANADA THAT CLONKING, TICKING ETC. ETC. WERE NORMAL OPERATION OF THE TRANSMISSION. IT CANT BE CAUSE I HAD A 2001 GMC TRUCK WHICH I TRADED FOR, THAT DROVE LIKE A TRUCK THIS ONE I HAVE NOW DRIVES LIKE A TANK. EVERY HOLE OR CRACK IN THE ROAD I CAN FEEL WHEN I HIT A SMALL HOLE OR A DIP IN THE PAVE THE VEHICLE WANTS TO DOG TRACK MOST OF THE TIME THE TRUCK PULLS TO THE LEFT, WHEN IT DOES THERE IS A SLIGHT VIBRATION YOU CAN FEEL FROM THE ACCELERATOR OR THE BRAKE. THIS VEHICLE I FIND IS A ACCIDENT WAITING TO HAPPEN. ITS A BIG VEHICLE AND TO SWERVE SIDE TO SIDE SCARES OTHER VEHICLES ON THE HIGHWAY, WHICH PUTS EVERYBODY AT RISK EVERYTIME I'M ON THE ROAD. FROM ALL THESE COMPLAINTS I DID TO GM STILL TODAY THEY TELL ME AND SHOW ME PAPERWORK FROM GM TECH LINE. STATING THAT EVERYTHING IS NORMAL AND NO WORK FROM THERE PART SHOULD BE DONE ON THIS TRUCK. IT'S LIKE IF GM HAS PEOPLE WORKING ON THESE STATEMENTS JUST TO COVER THEMSELVES FROM HAVING TO REPAIR OR CHANGE PARTS IN ORDER TO SAVE MONEY IN WHICH I WOULDN'T DOUGHT. IF YOU CAN HELP ME PLEASE. LET ME KNOW CAUSE THIS IS A VERY SERIOUS MATTER WHICH I WOULD LIKE TO FIX BEFORE I GET INTO AN ACCIDENT. I BELIEVE THERE IS A CONTROVERSY INTO ALL OF THIS. *NM

I HAVE A 2003 GMC SIERRA 1500. AT 1300 MILES, I LOST A FITTING THAT CONNECTS THE TRANSMISSION LINE TO THE RADIATOR FOR THE TRANNY COOLER AND THE TRANSMISSION WAS DESTROYED. A REBUILT TRANSMISSION WAS PUT IN MY PICKUP. I NOW HAVE 32000 MILES ON IT AND THE TRANSMISSION SEEMS TO "DOUBLE" SHIFT BETWEEN 2ND AND 3RD GEAR. I'VE HAD MY TRUCK IN THE SHOP 5 TIMES TO DIAGNOSE THIS PROBLEM. THE DEALERSHIP CANNOT REPRODUCE/FIND THE ISSUE. THE PRESSURE CONTROL SOLENOID WAS REPLACED ABOUT 4 DAYS AGO. THE TRANSMISSION IS STILL ACTING UP.

I PURCHASED MY 2003 GMC SIERRA Z71 IN AUG. 2003. IN DECEMBER 2003, WHILE PULLING A TRAVEL TRAILOR, THE SERVICE 4-WD LIGHT CAME ON AND THE TRUCK FELT AS IF IT HAD BEEN SHIFTED INTO NEUTRAL.I MANAGED TO GET THE TRUCK TO THE SIDE OF THE ROAD AND READ THE OWNERS MANUAL CONCERNING THE LIGHT. I TURNED THE TRUCK OFF AS THE BOOK SAID AND THEN RESTARTED. THE LIGHT STAYED ON, BUT THE TRUCK DID GO IN GEAR. SINCE THIS TIME, WHEN I PULL THE TRAILOR FOR A LONG PERIOD OF TIME, THE TRUCK WILL AGAIN FEEL AS IF IT IS IN NEUTRAL. I HAVE TO PUT THE TRUCK INTO 2ND OR 1ST GEAR TO GET THE TRANSMISSION TO ENGAGE. THE 4WD LIGHT COMES ON WITH OR WITHOUT THE TRAILOR HOOKED UP AND HAS BEEN CHECKED SEVERAL TIMES BY THE DEALER. THEY HAVE REPLACED THE SWITCH BUT THIS HAS NOT CORRECTED THE PROBLEM. THE TRANSMISSION SHIFTS SO HARD IT FEELS AS IF THE BACK END OF THE TRUCK WILL FALL OUT. I WAS TOLD THIS IS NORMAL OPERATION. SOMETHING NEEDS TO BE DONE TO CORRECT THIS PROBLEM AS THIS IS A HUGE SAFETY ISSUE. NO ONE CAN FEEL COMFORTABLE DRIVING DOWN A ROAD AND NEVER KNOWING IF YOU WILL BE HIT FROM BEHIND DUE TO THIS TRUCK STALLING FOR NO REASON. *AK

2003 GMC SIERRA MANUAL TRANSMISSION - SLOP OR CLUNK IN DRIVE TRAIN.. *AK

TL* THE CONTACT OWNS A 2003 GMC SIERRA 2500. THE CONTACT STATED THAT THERE WAS A LOSS OF POWER WHILE TRAVELING AT ANY SPEED. THE WARNING LIGHT ILLUMINATED FOR LOSS OF POWER INTERMITTENTLY. THE CONTACT HAD TO DEPRESS THE ACCELERATION PEDAL TO THE FLOORBOARD TO ACCELERATE ON MORE THAN ONE OCCASION BUT TO NO AVAIL. THE VEHICLE CONTINUED TO STALL WITHOUT WARNING. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER MORE THAN FIVE TIMES, WHO WAS NOT ABLE TO REPLICATE OR DETERMINE THE CAUSE OF THE FAILURE. THE VEHICLE HAD ALSO BEEN TAKEN TO THE DEALER FOR DIAGNOSIS BUT TO NO AVAIL. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS NOT AVAILABLE.

2003 GMC SIERRA SLT Z71 EXTENDED CAB, 13000 MILES. TRANSMISSION SHIFTS SLOWLY AND SLIPS BETWEEN 1ST AND 2ND. DRIVETRAIN VERY VERY NOISY BETWEEN UP AND DOWN SHIFTS. KNOCKING IN STEERING WHEEL. *LA