I agree it probably is a brake adjustment need. With a brake spoon or a flat screwdriver get under each wheel & remove the slot cover, if it has one, in the lower center of the backing plate. Put the adjustment tool in the slot & pull down on it after it engauges the cogs in the adjuster. Keep adjusting till you get a heavy drag on the wheel. Then back the adjustment up till the heavy drag releases & about 2-3 more clicks. When you get these brakes right the pedal will hardly go down at all. you will just apply pressure to it. Myself whenever I get another truck I go though the brakes completely & pack the wheel brgs.
