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em14 · 05-12-2008, 09:13 AM

I have a 2007 New Body Style 3500 Dura Max Allison Trans and the "GM" Controller ... Right after I started to tow trailers I started getting a Command Center Message which was telling me to "Check the Trailer Wiring" ... The mechanic and I checked everything and could not locate the problem. The mechanic communicated with GM/Chevy and they were aware of the problem and were working on it ... a couple months later the dealer received a new relay unit which is mounted on the frame (if I remember correctly) just above the rear axle .... no more messages ... Also, I continued to use the truck while waiting for the "redesigned relay" with out any hint of a problem and the brakes worked just fine through out all of this. I like having the control unit in the cab in the dash away from my leg. The unit has worked without a problem since installing the redesigned relay!

05-12-2008, 09:13 AM	#7 (permalink)
em14 Platinum Member Join Date: Sep 2002 Location: Florida Posts: 627	Re: GM intergrated trailer brake controller? I have a 2007 New Body Style 3500 Dura Max Allison Trans and the "GM" Controller ... Right after I started to tow trailers I started getting a Command Center Message which was telling me to "Check the Trailer Wiring" ... The mechanic and I checked everything and could not locate the problem. The mechanic communicated with GM/Chevy and they were aware of the problem and were working on it ... a couple months later the dealer received a new relay unit which is mounted on the frame (if I remember correctly) just above the rear axle .... no more messages ... Also, I continued to use the truck while waiting for the "redesigned relay" with out any hint of a problem and the brakes worked just fine through out all of this. I like having the control unit in the cab in the dash away from my leg. The unit has worked without a problem since installing the redesigned relay!