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How to Keep My Boat Trailer Surge Brakes From Locking Up  

Question:

I have a 2013 GMC Sierra 2500HD Duramax. When I put my truck in reverse to launch my boat or put it on the trailer the brakes will some times lock up. I know they’re surge brakes but don’t know how to fix it. My boat is a 2019 Malibu 24MXZ.

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Expert Reply:

With surge brakes, you have a brake actuator applying the needed pressure to the brakes. In order to back up you will need to have a manual lockout or an electric lockout solenoid, like the Replacement Solenoid Valve # T4748800, which will close when you shift the vehicle into reverse, allowing the trailer to be backed up.

expert reply by:
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Scott S
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