The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Factory trailer brake controller and plug?

*gmachinz* · 10-18-2019, 09:04 AM

I am 99.9% sure GM never did. For one, the OE 4-way rubber vulcanized connectors are obsolete so nobody is going to offer a direct plug in for lights-even for a 4-way flat...and there is NO way they offered one for a 7-round since it requires a more substantial frame ground as well as a control wire and power +12V feed from the front, fused. So extremely doubtful they had a 4-flat ever and NEVER offered a plug in for 7-round trailers.

10-18-2019, 09:04 AM	#7
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: Factory trailer brake controller and plug? I am 99.9% sure GM never did. For one, the OE 4-way rubber vulcanized connectors are obsolete so nobody is going to offer a direct plug in for lights-even for a 4-way flat...and there is NO way they offered one for a 7-round since it requires a more substantial frame ground as well as a control wire and power +12V feed from the front, fused. So extremely doubtful they had a 4-flat ever and NEVER offered a plug in for 7-round trailers.