MY 2006 DURMAX DIESEL 2500 TRUCK HAS 3 TRANSMISSION COOLER LINES THAT RUN FROM THE TRANSMISSION TO THE RADIATOR. THESE HOSES HAVE ALUMINUM PIECES ON EACH END AND THEY LEAK 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. THERE APPEARS TO BE A SIGNIFICANT PROBLEM WITH THESE AS DETAILED BY DOING A WEB SEARCH. I PULLED IN MY GARAGE FROM A TRIP AND A FEW MINUTES LATER MY WIFE SAW SMOKE COMING FROM THE GARAGE. I JUMPED BACK IN AND BACKED IT OUT BEFORE IT ACTUALLY CAUGHT FIRE BUT UPON INSPECTION, THE LEAKING TRANSMISSION FLUID FROM THE LINES HAD GOTTEN ON THE EXHAUST AND STARTED TO SMOKE. THIS IS A SERIOUS ISSUE THAT GM CONTINUES TO IGNORE. SOMEONE WILL EVENTUALLY LOSE SIGNIFICANT LIFE OR PROPERTY IF THIS CONTINUES. THE REPLACEMENT LINES STARTED LEAKING IN A MERE COUPLE OF WEEKS. *TR