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how do i install transmission coolant hoses on my 2006 gmc 3500hd diesel?
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Frank, it looks as though you have a common problem caused by an inadequate factory crimp on the transmission cooling lines.
To change the cooling line, check out the instructions of a guy that has done it before.
Good luck on that.
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Note also that on the bottom of the forum thread, the moderator chimes in and mentions that it is covered under warranty.
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