NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
32 reportsClear category filter80,000 miles · Jun 4, 2010
Power Train
MY 2006 DURMAX DIESEL 2500 TRUCK HAS TRANSMISSION HOSES THAT RUN FROM THE TRANSMISSION TO THE RADIATOR. THESE HOSES HAVE ALUMINUM PIECES ON EACH END AND THEY SEEP OIL AT THE JOINT WHERE THE ALUMINUM JOINS A PIECE OF RUBBER HOSE IN THE CENTRE. THEY CONTINUOUSLY LEAK TRANSMISSION OIL ON THE GROUND AT THIS CRIMP JOIN. THE COLDER TH…
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MY 2006 DURMAX DIESEL 2500 TRUCK HAS TRANSMISSION HOSES THAT RUN FROM THE TRANSMISSION TO THE RADIATOR. THESE HOSES HAVE ALUMINUM PIECES ON EACH END AND THEY SEEP OIL AT THE JOINT WHERE THE ALUMINUM JOINS A PIECE OF RUBBER HOSE IN THE CENTRE. THEY CONTINUOUSLY LEAK TRANSMISSION OIL ON THE GROUND AT THIS CRIMP JOIN. THE COLDER THE WEATHER, THE WORSE THESE HOSES LEAK. I FEEL BECAUSE OF THE DAMAGE THIS OIL CAUSES TO OUR FISH STOCKS AND THE ENVIRONMENT THESE HOSES SHOULD BE RECALLED AND REPLACED A CHEVROLET'S EXPENSE. TO DATE SO FAR, ALL ATTEMPTS I'VE MADE TO CORRECT THIS PROBLEM, AT KELOWNA CHEVY OR HEAD OFFICE HAVE FAILED. THEY ARE NOW INTERESTED. PLEASE GIVE ADVICE. *TR
NHTSA ODI #10334602
85,000 miles · Feb 3, 2010
Power TrainService Brakes, Hydraulic
MY CHEVROLET 2500 HAS A FUNCTION CALLED GRADE BRAKING TO ASSIST THE BRAKES WHEN TOWING A LOAD DOWN HILL. IT HAS QUIT FUNCTIONING BUT THE DEALERS CANNOT FIGURE OUT HOW TO TROUBLESHOOT THE PROBLEM. THEY SAID SINCE NO CODES SHOW ON THE COMPUTER I HAVE TO WAIT UNTIL I HAVE A TRAILER BEHIND IT AND AM NEAR A DEALER THAT IS NEAR A STEE…
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MY CHEVROLET 2500 HAS A FUNCTION CALLED GRADE BRAKING TO ASSIST THE BRAKES WHEN TOWING A LOAD DOWN HILL. IT HAS QUIT FUNCTIONING BUT THE DEALERS CANNOT FIGURE OUT HOW TO TROUBLESHOOT THE PROBLEM. THEY SAID SINCE NO CODES SHOW ON THE COMPUTER I HAVE TO WAIT UNTIL I HAVE A TRAILER BEHIND IT AND AM NEAR A DEALER THAT IS NEAR A STEEP GRADE TO TEST IT. THE WHOLE POINT OF THE SYSTEM IT TO KEEP THE TRUCK FROM RUNNING AWAY ON A STEEP GRADE. DOESN'T SOUND LIKE THE PLACE TO TEST IT. THERE ARE NO STEEP GRADES WITH IN 150 MILES OF ME. THERE SHOULD BE A SIMULATED TEST RUN BY THEIR COMPUTER. *TR
NHTSA ODI #10304402
41,550 miles · Jan 9, 2010
Power Train
I HAD A TRANSMISSION COOLER LINE TO FAIL AND LEAK BADLY AFTER 41,000 MILES.IT WAS CAUGHT IN TIME TO PREVENT TRANSMISSION FAILURE BUT HOW ABOUT THE NEXT ONE?IT WAS REPLACED WITH A NEW PART AT THE CHEVY DEALER. *TR
NHTSA ODI #10298827
48,625 miles · Dec 30, 2009
Power Train
2006 CHEVY SILVERADO 2500HD HAS DEVELOPED A TRANSMISSION COOLER LINE LEAK AT THE METALLIC COUPLER. VEHICLE ONLY HAS LESS THAN 50K MILES UNDER LIGHT LOAD CONDITIONS. NEVER TOWED ANYTHING OVER 3KLBS. I UNDERSTAND THIS IS A VERY HIGH FAIL ITEM AND EVEN THEIR IMPROVED LINES ARE LEAKING AS WELL. THIS SHOULD BE A RECALL ITEM AND R…
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2006 CHEVY SILVERADO 2500HD HAS DEVELOPED A TRANSMISSION COOLER LINE LEAK AT THE METALLIC COUPLER. VEHICLE ONLY HAS LESS THAN 50K MILES UNDER LIGHT LOAD CONDITIONS. NEVER TOWED ANYTHING OVER 3KLBS. I UNDERSTAND THIS IS A VERY HIGH FAIL ITEM AND EVEN THEIR IMPROVED LINES ARE LEAKING AS WELL. THIS SHOULD BE A RECALL ITEM AND REPLACED AT NO COST TO THE CUSTOMER. *TR
NHTSA ODI #10297602
63,540 miles · Nov 23, 2009
Power Train
2006 2500HD, TRANSMISSION COOLER LINE LEAKING AND BOTH OIL COOLER LINES LEAKING. OIL COOLER LINES WERE REPLACED IN 2007 UNDER WARRANTY. BROUGHT TRUCK INTO DEALER TODAY, (23 NOV 2009) OIL COOLER LINES REPLACED, TRANSMISSION LINE ORDERED. DEAL SAID THAT IT IS A KNOWN PROBLEM BUT CHEVY WILL NOT RECALL. ARE THEY WAITING FOR A FIRE A…
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2006 2500HD, TRANSMISSION COOLER LINE LEAKING AND BOTH OIL COOLER LINES LEAKING. OIL COOLER LINES WERE REPLACED IN 2007 UNDER WARRANTY. BROUGHT TRUCK INTO DEALER TODAY, (23 NOV 2009) OIL COOLER LINES REPLACED, TRANSMISSION LINE ORDERED. DEAL SAID THAT IT IS A KNOWN PROBLEM BUT CHEVY WILL NOT RECALL. ARE THEY WAITING FOR A FIRE AND DEATH TO OCCUR? THIS IS A KNOW PROBLEM AND SHOULD BE A RECALL TO REPLACE THESE LINES AT NO COST. PAID $437 TODAY AND WILL PAY $262 ON WED. WHEN THE TRANSMISSION COOLER LINE COMES IN. THIS IS TOTALLY UNACCEPTABLE. *TR
NHTSA ODI #10293316
27,830 miles · Nov 13, 2009
Power Train
LEAKING TRANSMISSION COOLER LINES. LINES CONSIST OF A FLEXIBLE SECTION SWAGED TO SECTION OF HARD LINE. THERE ARE 3 LINES TOTAL. ALL 3 HAVE A HISTORY OF LEAKAGE WHERE THE FLEXIBLE SECTION SWAGES TO THE HARD SECTION. THIS HAS BEEN A VERY COMMON OCCURRENCE REPORTED BY OTHER OWNERS WHICH CAN BE EASILY VERIFIED THROUGH NUMEROUS ONLIN…
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LEAKING TRANSMISSION COOLER LINES. LINES CONSIST OF A FLEXIBLE SECTION SWAGED TO SECTION OF HARD LINE. THERE ARE 3 LINES TOTAL. ALL 3 HAVE A HISTORY OF LEAKAGE WHERE THE FLEXIBLE SECTION SWAGES TO THE HARD SECTION. THIS HAS BEEN A VERY COMMON OCCURRENCE REPORTED BY OTHER OWNERS WHICH CAN BE EASILY VERIFIED THROUGH NUMEROUS ONLINE FORUMS.I.E WWW.DIESELPLACE.COM. *TR
NHTSA ODI #10292059
35,000 miles · Apr 4, 2009
Power Train
2006 CHEVY SILVERADO 2500 HD W/ALLISON TRANS. TRANSMISSION LEAK. TOOK TRUCK TO DEAL, DEAL FIX 1 OUT OF 3 LINES UNDER WARRANTY. 4000 MILES AFTER DEALER FIXED FIRST LINE, 2 OTHER STARTED LEAKING, DEAL WOULD NOT FIX OTHER 2 LINES STATING TRUCK WAS NO LONGER UNDER WARRANTY. GMC SHOULD RECALL THE VEHICLE BASE ON POSSIBLE FIRE. *TR
NHTSA ODI #10264138
Mileage unknown · Mar 16, 2009
Power TrainStructure
TL*THE CONTACT OWNS A 2006 CHEVROLET SILVERADO 3500. WHILE DRIVING BETWEEN 55-60 MPH ON NORMAL ROAD CONDITIONS, THE VEHICLE VIBRATED UNEXPECTEDLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION AND THEY STATED THAT THE TORQUE CAUSED SEPARATION OF THE CENTRAL DIFFERENTIAL. THE VEHICLE WAS REPAIRED. IN ADDITION, …
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TL*THE CONTACT OWNS A 2006 CHEVROLET SILVERADO 3500. WHILE DRIVING BETWEEN 55-60 MPH ON NORMAL ROAD CONDITIONS, THE VEHICLE VIBRATED UNEXPECTEDLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR INSPECTION AND THEY STATED THAT THE TORQUE CAUSED SEPARATION OF THE CENTRAL DIFFERENTIAL. THE VEHICLE WAS REPAIRED. IN ADDITION, THE MAINFRAME CRACKED IN HALF, BUT WAS NOT REPAIRED. THE FAILURE WAS POSSIBLY CONTRIBUTED TO THE WEIGHT OF THE SNOWPLOWS OR DIESEL. THE VIN WAS UNKNOWN. THE FAILURE AND CURRENT MILEAGES WERE UNAVAILABLE.
NHTSA ODI #10262024
15,000 miles · Jul 22, 2008
Power Train
LOUD SQUEAL NOISE IN THE TRANSMISSION OF 2006 CHEVY SILVERADO WHEN IT RUNS IN LOW GEAR AND WHEN IT IS IN DRIVE AND SHIFTS FROM LOW TO HIGH GEAR. THE TRUCK WAS TAKEN BACK TO THE DEALER 2 TIMES AND WE WERE TOLD IT WAS A NORMAL NOISE FOR THE 4L80E TRANSMISSION. WE TOOK IT TO ANOTHER GM DEALER WHO SAID THERE WAS A PROBLEM. WE CAL…
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LOUD SQUEAL NOISE IN THE TRANSMISSION OF 2006 CHEVY SILVERADO WHEN IT RUNS IN LOW GEAR AND WHEN IT IS IN DRIVE AND SHIFTS FROM LOW TO HIGH GEAR. THE TRUCK WAS TAKEN BACK TO THE DEALER 2 TIMES AND WE WERE TOLD IT WAS A NORMAL NOISE FOR THE 4L80E TRANSMISSION. WE TOOK IT TO ANOTHER GM DEALER WHO SAID THERE WAS A PROBLEM. WE CALLED GM AND THEY HAD US TAKE THE TRUCK BACK TO THE DEALER WE BOUGHT IT FROM. WE WERE TOLD IT WAS A NORMAL NOISE AFTER THE MECHANIC DROVE IT. WHEN IT WAS USED TO PULL A TRAILER LOADED WITH HAY, THE NOISE WAS EVEN GREATER. I AM CONCERNED THAT THERE WILL BE AN ACCIDENT WITH THIS TRUCK. *TR
NHTSA ODI #10235284
35,000 miles · Mar 14, 2008
Power Train
MY TRANSMISSION COOLER LINES WERE LEAKING AND I'M CONCERNED ABOUT IT DUE TO THE TRANSMISSION FLUID BEING A COMBUSTIBLE MATERIAL. IF THIS MATERIAL DRIPPED ONTO A HOT EXHAUST AND IGNITED WHILE PARKED IN THE "ATTACHED" GARAGE OF OUR HOME, IT COULD POSE A MAJOR SAFETY HAZARD...NOT TO MENTION IT COULD DO TO THE NEIGHBORS HOME BEING …
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MY TRANSMISSION COOLER LINES WERE LEAKING AND I'M CONCERNED ABOUT IT DUE TO THE TRANSMISSION FLUID BEING A COMBUSTIBLE MATERIAL. IF THIS MATERIAL DRIPPED ONTO A HOT EXHAUST AND IGNITED WHILE PARKED IN THE "ATTACHED" GARAGE OF OUR HOME, IT COULD POSE A MAJOR SAFETY HAZARD...NOT TO MENTION IT COULD DO TO THE NEIGHBORS HOME BEING RELATIVELY CLOSE. THANK YOU FOR YOUR TIME. *TR
NHTSA ODI #10221234