My first reaction to the OEM brake controller was skepticism, followed by a pleasant suprise that the controller behaved well and worked as smoothly as my Techonsha.

This winter, with no trailer on, started seeing messages of SERVICE TRAILER BRAKE SYSTEM. At first, when I hooked on a trailer, the message would clear and things worked normally. Then after awhile, they didn't work at all.

Assuming snow or salt had made its way into the female connector, I opened things up and found clean bright contacts...put things back together, it works normally for awhile, then back to intermittant issues.

Found out that Chevrolet has located the controller unit external to the cab, back by the spare tire area...also they have abandoned the standard female plug at the fuse box for throwing my old Techonsha at the problem...thanks guys...NOT.

Hunting for a ground wire issue at the controller today. Its -7F out. Wish me luck.