Size of the brake lines depend on the year, Series, Make, Model and wheel cylinders of your truck. Most common brake line sizes are 1/8", 3/16" & 1/4", along with the corresponding double-flare nuts, which are matched to the wheel cylinder female brake line opening sizes.
Last edited by 4-5-6 Chevy Trucks; 02/29/2012 7:13 PM.
