Wiring problems of the 2015 Chevrolet Silverado 3500

Engine loss power while pulling a loaded horse trailer around 10,000 pounds. Error message saying power has been reduced. The top speed while on a hill was abiut 15 miles an hour. Tractor traillers had to manuver around me due to the low speed on an expressway with 70 mile an hour speed limit. The dealer said cause was fraying of the wiring harness probably around the turbo. After research on the internet, I found this was a frequent problem. Truck only has 43,000 miles on it. I have requested the old wiring harness for inspection.

Check trailer wiring warning comes on and chime sounds every few seconds. Check trailer tail lights,brake, both turns signals,and use manual brake lever. Every thing works fine. Then it quit after two hours. Took it in to dealer in terrace,bc,CA. Was told that vehicle was working fine but the trailer plug was not a blade type and that was the problem. Was also told that I did't have trailer brakes when the warning to check trailer wiring comes on. My 6800 mile trip in may 2017 with the same trailer the check trailer warning never came on. On or 3800 mile trip to british columbia it was a continual problem off and on. I have since put a blade plug on the trailer but have not used it. In November 2016 while pulling a cargo trailer I had the same problem. Took it in to chevy dealer in medford, or and was told I had a bad ground on the trailer. I had just rewired the trailer with all new led lights, but I checked all wiring and never found anything. This trailer does"t have a blade plug on it. I haven"t used trailer since. I also have a 12,000# boat that I tow and it has the same plug as the others. I haven't had any problem with it. It does have surge brakes. These three trailers that I have gave me no problems when I towed them with my 2003 chev 2500hd silverado. This seems to be a common problem with the new chevy trucks by the number of posts on the internet.

Our ¿check trailer wiring¿ message first appeared on the dic on January 5, 2016 on California highway 12, near fairfield, CA. 0. We stopped and applied di-electric grease to the 7 pin plug. The message re-appeared and cleared itself, indicating ¿trailer connected¿. At 7,380 miles, checked the truck and found no problems, and advised us of gm¿s trailer wiring TSB, and suggested the problem was with the trailer and that we purchase a specific pollak 7 pin trailer end plug. They provided the name of a nearby truck shop, who that the specified pollak plug. We headed overnight to chowchilla, CA and the next morning, replaced the 7 pin connector with the pollak plug, and we cleaned and checked the trailer ground at the king pin. We left chowchilla and in urban traffic, the ¿check trailer wiring¿ message would appear as we applied the truck brake and then clear itself with ¿trailer connected¿ as we headed down the highway or freeway. We went through urban traffic in palmdale and lancaster, CA that same day, and at a stop light on level ground, with the ¿check trailer wiring¿ message appearing, I applied the manual trailer brakes, and took my foot off the truck brakes, and the trailer/truck rolled ahead - no brakes on the trailer.

A warning message comes on the dash telling the driver there is a issue with the trailer brakes, or wiring system. The trailer brakes become inoperable when this comes on. We have contacted gm with the issue, both at the dealer level and at the corporate level; and they insist it is a problem with our trailers. The same trailers are used with older Chevrolet trucks without incident. We have also been informed by gm that the 2015 silverado 2500's are equipped with a more sensitive trailering system. When the connection becomes wet during inclement weather, or the truck hits a bump; and the connector loses contact momentarily the message will illuminate. Resulting in the loss of trailer brakes. This is a serious safety issue.