- CVBMC Position on SAE J2497 Comment Letter – On Sept. 13, 2022, CVSA, on behalf of the Commercial Vehicle Brake Manufacturers Council (CVBMC), submitted comments to the American Trucking Associations’ Technology Maintenance CouncilĀ S.1 Future Truck Trailer Interface Task Force regarding the TMC S.1 Next Generation Tractor/Trailer Electrical Interface pertaining to language of SAE J2497.