Question about 2004 Chevrolet Silverado 2500HD

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Locks brakes on one side of trailer when off

On a 2004 Avalanche, the brakes lock on the right side of the trailer without brake pedal application and controller sending minimal power. Brakes have been adjusted and all 4 tires have equal pressure.

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Hi check that your hyd cylinder on that side isnt sticking

Posted on Nov 15, 2009


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The brake pedal switch will casue both these issues. Are you sure the switch is good? You can test it with a multimeter. Remove the switch. When it's removed the switch will be in the closed position. When you adjust it, you want to hear the switch click right after you depress the pedal. Adjust it so the switch doesn't click until you begin pressing the pedal. Good luck.

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Trailer brake controller problem

I found the problem. Talking with a technician from the controller company, we determined that it was a fuse problem. I found that the fuse to the CHMSL was blown.

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Good luck.

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