2WD & 4WD Brake Proportioning Valve Replacement for GMC Chevy Truck C/K 1500 2500 3500 15606198 172-2069 is up for auction in Automotive. The current bid is $2.00, 95% below the $43.00 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.