sounds like it could be your caliper. most likely your slide pins are freezing up or your caliper piston is freezing up. to check the slide pins just take the caliper off and make sure they arent rusty or anything. if they are clean the slide pins and throw some anti seize in with the slide pins if its the piston prolly have to replace the whole caliper.Every time I drive the truck for the first 2-3 minutes the brakes tend to lock up even if i barely tap them. It goes away after a few mins of driving and a few times of pressing the brakes.
Is this normal? Why does it do this?