2003 GMC SIERRA Power Trainautomatic Transmission Problems

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

TRANSMISSION: BEEN FIXED 3 TIMES AND FINALLY REPLACED A/C: REPAIRED ONCE FRONT END-STEERING: REPAIRED 3 TIMES AND STILL NOT FIXED. *JB

TRANSMISSION HAS "CLUNKING" NOISE WHEN VEHICLE SHIFTS FROM SECOND TO THIRD GEAR WHEN STARTING AND DOWN SHIFTING WHEN STOPPING. THE NOISE STARTED AT APPROXIMATELY 4000 MILES AND CONTINUES TO PROGRESSIVELY GET LOUDER AS THE VEHICLE CONTINUES TO BE DRIVEN. THE TRANSMISSION HAS NOT FAILED TO OPERATE AT THIS TIME BUT EXPECT IT TO FAIL SOMETIME IN THE NEAR FUTURE. *JB

CONSUMER COMPLAINED ABOUT A COUPLE OF PROBLEMS. ONE WAS TRANSMISSION. WHILE DRIVING AT VARIOUS SPEEDS GEAR SLIPPED. WHEN VEHICLE WAS TAKEN TO DEALER FOR SERVICE MECHANIC DETERMINED THAT THE CAUSE WAS LOW OIL. THE OTHER WAS FOR THE STEERING COLUMN. WHEN DRIVING AT VARIOUS SPEEDS VEHICLE KNOCKED AND SQUEAKED INTERMITTENTLY. STEERING COLUMN HAD TO BE REPLACED ONCE BEFORE FOR SAME PROBLEM. *AK

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

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...

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 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...

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.

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

WHILE DRIVING AT ANY SPEED VEHICLE HAS A PROBLEM SHIFTING INTO A GEAR. WHEN THE GEAR IS CHANGING THERE IS A HARD THUMP/A BRIEF HESITATION BEFORE THE GEAR ACTUALLY GOES IN TO THE PROPER POSITION. VEHICLE HAD BEEN TO THE REPAIR SHOP FIVE TIMES FOR THIS SAME PROBLEM, BUT PROBLEM STILL PERSISTS. DEALER AND MANUFACTURER HAVE BEEN NOTIFIED OF THE PROBLEM.*AK

I OWN A 2003 GMC SEIRRA 4X4 SLE (EXT) CAB AND THE TRANSMISSION IS VERY JERKY BETWEEN FIRST AND SECOND GEAR AND BETWEEN SECOND AND THIRD GEAR ALSO , BUT AT TIMES THERE IS A CLUCK NOISE BETWEEN SECOND AND THIRD GEAR. WHICH SOUNDS LIKE A UNIVERSAL JOINT THAT IS BAD.FIRST TIME I TOOK IT TO THE DEALER THEY SAID THEY COULDN'T REPRODUCE THE PROBLEM. SECOND TIME THEY CHANGE THE PRESSURE CONTROL SOLENOID IN THETHE VALVE BODY, FILTER, AND FLUID IN TRANSMISSION. IT WORKED GREAT FOR @ TWO WEEKS AND NOW IT'S BACK. THERE IS A PROBLEM HERE . TWO FRIENDS AT WORK HAVE THE SAME PROBLEMS WITH THERE 2003 GMC'S AND CHEVY'S TRUCKS.*AK

2003 GMC SIERRA, 7000 MILES AUTOMATIC TRANSMISSION IS JERKY. VERY POOR PERFORMANCE. SERVICE DEPARTMENT REFUSES TO ACKNOWLEDGE THE PROBLEM. I KNOW FOR A FACT THIS IS FAIRLY WIDESPREAD. WHAT CAN THE DEALER DO ABOUT IT?

WHEN VEHICLE WAS STOPPED ON AN INCLINE WITH GEAR PLACED IN PARK BEFORE ENGAGING PARKING BRAKE THE TRANSMISSION LOCKED IN PARK. IN ORDER TO UNLOCK IT THE CONSUMER HAD TO HAVE THE TOW TRUCK PULL THE VEHICLE IN ORDER TO UNLOCK IT. THE MANUFACTURER ADVISED THAT THIS WAS NORMAL OPERATION. TRUCK IS A 2003 GMC 1/2TON 4-WHEEL DRIVE PICKUP. *NLM

WHILE DRIVING THE FOURTH GEAR OF THE AUTOMATIC TRANSMISSION JUMPED. THE DEALER INSPECTED THE VEHICLE BUT COULD NOT DUPLICATE OR CORRECT THE PROBLEM. *NLM