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Discussion Starter · #1 ·
My 2008 durmax 4x4 says service trailer brakes in the message center. My trailer brakes aren't working very well at all . What do I need to check? I know its the truck I put it on the Dodge and they work great,. I use to run them around 5 and that was plenty now it is on 10 and it hardly works.
The truck has new brakes on all 4 corners also.
 
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