I bought a 2009 Silverado 2500 at auction and found the entire trailer brake control module and relay was missing. I ordered it and it was on my doorstep as expected. Installation went smoothly, no complaints. I got error code C1114 after installation and then realized I had to program it at my local auto ECM/programming shop for $100 so budget is at least that much since the local Chevrolet dealer is $160 wanted to.