Review on ACDelco 20904439 Original Equipment Continue by David Alexander

Silverado 2500HD 6.0 Gas 4x4 2012 The trailer braking system was reported after an unintentional drive through an agricultural field. Research found this to be a common malfunction. Because of this, I ordered a new one to replace it. When I got to the relay on my truck (had to drop the spare tire) I found that the hardware was badly rusted and also noticed corroded wire damage. This relay is mounted on a separate bracket together with the computer module. With the entire assembly removed I was able to access the relay mounting screws to grind down the heads for removal. In the process I had to repair two rusted wires with about 6 inches of new 12 gauge wire. When everything was assembled, I no longer had the error message. In the end the relay was probably fine, but cheap insurance for a part that is known to fail.