LEAKING TRANS LINES ON 06 CHEVY ALLISON TRANS. *TR
2006 Chevrolet Silverado 2500
Owner reports · Recalls · Investigations
More warning signs than most Silverado 2500 years
Owner complaints for the 2006 Chevrolet Silverado 2500 are substantially higher than the model-year median of 81.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 2500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
165 reports with mileage · 12 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes. Review the 46 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes, Hydraulic. Review the 24 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
32 reportsTRANSMISSION LINES THAT RUN FROM THE TRANSMISSION COOLER NEXT TO THE RADIATOR CONTINUE TO LEAK. THE LINES SEEM TO LEAK MORE IN COLDER CLIMATES. I AM ON MY THIRD SET IN 60 DAYS. TRANSMISSION FLUID WAS A FLAMMABLE SUBSTANCE THE LAST I KNEW. *TR
TRANSMISSIONS LINES ARE CONTINUING TO LEAK. HAVE BEEN TO THE DEALER TWICE THIS YEAR. DEALER HAS REPLACED COOLER LINES UNDER WARRANTY. TRUCK ONLY HAS 32000 MILES ON IT. DEALER NEEDS TO COME UP WITH A PERMANENT FIX, OR IT IS GOING TO COST THE CONSUMER A LOT OF MONEY TO KEEP HAVING THE TRANSMISSION LINES REPLACED. *TR
LOWER TRANSMISSION LINE LEAKING AGAIN SHORTLY AFTER BEING REPLACED WITH A NEW ONE. THIS IS HAPPENING TO VERY MANY TRUCK NUMEROUS TIMES. 2006 2500 HD DURAMAX /ALISON. *TR
THE ALLISON AUTOMATIC TRANSMISSION COOLER LINES ARE LEAKING. THIS POSES A FIRE HAZARD. GM NEEDS TO REDESIGN THE HOSES THAT CONNECT THE TRANSMISSION AND TRANSMISSION COOLER. MANY OTHERS ARE HAVING THIS SAME PROBLEM AND HAVE HAD THE LINES REPLACED MULTIPLE TIMES. *TR
I HAVE A 2006 3/4 TON PICK UP WITH THE DURAMAX DIESEL AND ALISON TRANSMISSION. IN NOVEMBER OF 2006 AT ABOUT 20K MILES, A LOW PRESSURE TRANSMISSION COOLING LINE (PART NUMBER 219989580) DEVELOPED A MAJOR LEAK AND REQUIRED REPAIR. WITHIN WEEKS, THE REPLACED LINE FAILED AND THE DEALER INFORMED US THAT MANY TRUCKS OF THE SAME DESIGN…
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I HAVE A 2006 3/4 TON PICK UP WITH THE DURAMAX DIESEL AND ALISON TRANSMISSION. IN NOVEMBER OF 2006 AT ABOUT 20K MILES, A LOW PRESSURE TRANSMISSION COOLING LINE (PART NUMBER 219989580) DEVELOPED A MAJOR LEAK AND REQUIRED REPAIR. WITHIN WEEKS, THE REPLACED LINE FAILED AND THE DEALER INFORMED US THAT MANY TRUCKS OF THE SAME DESIGN WERE FAILING FOR THE SAME PART. IT TOOK WEEKS TO GET A REPLACEMENT PART FOR GM. FEED BACK FROM OTHER GM DEALERS INDICATED THAT THE PROBLEM WAS WIDE SPREAD. WHEN A REPLACEMENT PART WAS FINALLY PROVIDED, WE WERE INFORMED BY GM WESTERN REGION SERVICE THAT A DESIGN "FIX" HAD BEEN IMPLEMENTED AND THAT THE TRUCK WAS SAFE TO DRIVE. THREE WEEKS AGO, (45,000 MILES) MY TRUCK STARTED LEAKING TRANSMISSION FLUID AGAIN. AN INSPECTION BY THE DEALER REVEALED THAT NOT ONLY THE SAME LINE WAS LEAKING AGAIN BUT THAT TWO OTHER LINES OF THE SAME DESIGN WERE ALSO LEAKING. THIS DEALER, E&L MOTORS IN KEMMERER HAD ALREADY SEEN MORE THAN A DOZEN TRUCKS IN THE PAST FEW WEEKS WITH THE SAME PROBLEM AND WAS FRUSTRATED BECAUSE REPLACEMENT LINES FROM GM WOULD START LEAKING WITHIN DAYS OF INSTALLATION. WE WERE TOLD BY THE SERVICE MANAGER THAT THERE WAS A RUMOR THAT GM WOULD BE DOING A RECALL ON THIS PART. IN THE MEAN TIME, I AM NOT GETTING ANY DIRECT INFORMATION AND THE CORRECTIVE ACTION GM IS TELLING IT'S DEALERS IS TO HAVE THE OWNER CHECK THE TRANSMISSION FLUID FREQUENTLY, A SPECIAL FLUID WHICH IS NOT AVAILABLE THROUGH ANYONE EXCEPT AN AUTHORIZED GM DEALER. RECENT CONTACTS WITH OTHER GM DEALERS HAVE EXPOSED THE SAME PROBLEM WITH "DOZENS" OF TRUCKS IN OUR AREA WHICH ARE ALSO WAITING FOR A RELIABLE REPLACEMENT PART. I USE THIS TRUCK FOR WORK. DURING THE WINTER MONTHS, MY BIGGEST CONCERN IS HAVING ONE OF THE LEAKING LINES BLOW LEAVING ME STRANDED IN FREEZING WEATHER WHERE CELL COVERAGE EVEN ON THE INTERSTATE IS NOT ALWAYS POSSIBLE. *TR
THIS IS A 2006 6.6 TURBO DIESEL 2500 HD SILVERADO, THE FOUR WHEEL DRIVE WILL NOT ENGAGE LIGHT KEEP FLASHING, SERVICE 4 WHEEL DRIVE IS ON , THIS TRUCK ONLY HAS 19,000 MILES ON IT. *TR
I OWN A 2006 CHEVROLET PICKUP TRUCK AND FOUND THAT IF YOU TURN THE KEY ONE CLIP FORWARD YOU CAN PULL THE SHIFT LEVER INTO ANY GEAR INCLUDING NEUTRAL WITHOUT STEPPING ON THE BRAKE. I CHECKED AROUND AND FOUND THAT ANY CHEVROLET TRUCK, VAN OR PICKUP ALL THE WAY BACK TO 2003 WILL DO THE SAME THING. I HEARD BUT DON'T KNOW FOR SURE …
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I OWN A 2006 CHEVROLET PICKUP TRUCK AND FOUND THAT IF YOU TURN THE KEY ONE CLIP FORWARD YOU CAN PULL THE SHIFT LEVER INTO ANY GEAR INCLUDING NEUTRAL WITHOUT STEPPING ON THE BRAKE. I CHECKED AROUND AND FOUND THAT ANY CHEVROLET TRUCK, VAN OR PICKUP ALL THE WAY BACK TO 2003 WILL DO THE SAME THING. I HEARD BUT DON'T KNOW FOR SURE THAT A YOUNG BOY WAS HURT WHEN HE TURNED THE KEY AND PULLED THE LEVER DOWN CRASHING THE TRUCK. *NM
THE VEHICLE MAKES A HIGH PITCH NOISE WHILE LIGHTLY ACCELERATING. IT STRONGLY APPEARS TO BE COMING FROM THE TRANSMISSION. THE DEALERS TO DATE HAS REFUSED TO ACKNOWLEDGE THIS PROBLEM WITH MY VEHICLE. I HAVE HAD THIS COMPLAINT SINCE THE FIRST WEEK OF PURCHASING THE VEHICLE. I PRESENTLY HAVE 2200 MILES. *JB
I PURCHASED NEW A 2006 CHEV. SILVERADO 2500 TK (6 LITER ENG.), AT 1900 MILES THE TRANSMISSION FELT LIKE IT SLIPPED. IMMEDIATELY AFTER, UNDER LIGHT ACCELERATION, YOU GET A HIGH PITCHED NOISE COMING FROM THE TRANSMISSION. TOOK VEHICLE TO LOCAL DEALERSHIP AND WAS INFORMED THAT THE PROBLEM WAS IN THE PLANETARY GEARS OF THE TRANSMI…
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I PURCHASED NEW A 2006 CHEV. SILVERADO 2500 TK (6 LITER ENG.), AT 1900 MILES THE TRANSMISSION FELT LIKE IT SLIPPED. IMMEDIATELY AFTER, UNDER LIGHT ACCELERATION, YOU GET A HIGH PITCHED NOISE COMING FROM THE TRANSMISSION. TOOK VEHICLE TO LOCAL DEALERSHIP AND WAS INFORMED THAT THE PROBLEM WAS IN THE PLANETARY GEARS OF THE TRANSMISSION AND GM INFORMED THEM THAT REPAIRS SHOULD NOT BE PERFORMED. MEANWHILE I STILL HAVE THE NOISE AND AM SERIOUSLY CONCERNED ABOUT THE DEPENDABILITY OF THE VEHICLE. *NM
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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