Here's a trucker to go with that truck. He's based on a character I played a year ago in a one-shot home-grown game. That character was loosely based on Jack from Big Trouble in Little China.
Nash (Tough 3): CR 3; Medium-size Human; HD 3d10+12; hp 33; Mas 16; Init +3; Spd 30 ft.; Defense 16, touch 13, flat-footed 13 (+3 Dex, +2 class, +1 leather jacket); BAB +2; Grap +3; Atk +4 melee (1d6+1 nonlethal, unarmed strike) or +5 ranged (2d8, 12-gauge shotgun) or +5 ranged (4d6, fragmentation grenade); SV Fort +5, Ref +4, Will +1; AP 6; Rep +1; Str 13, Dex 16, Con 16, Int 14, Wis 10, Cha 13.
Occupation: Blue Collar (bonus class skills: Drive, Intimidate, Repair).
Talents: Robust, Damage Reduction 1/-.
Skills: Craft (mechanical) +4, Drive +12, Gamble +2, Intimidate +8, Knowledge (streetwise) +6, Profession +4, Read/Write English, Repair +7, Speak English.
Feats: Brawl, Personal Firearms Proficiency, Simple Weapons Proficiency, Surface Vehicle Operation (heavy wheeled), Vehicle Expert.
Possessions: Cell phone, mechanics toolkit, pool cue, deck of cards, pack of cheap cigars, rabbit?s foot keychain, jug of moonshine, black duffel bag, zippo decorated with US flag, 12-gauge shotgun with 20 shells, 6 unlicensed fragmentation grenades, leather jacket, tattoos: US flag on right bicep, "mudflap naked lady" on left inside forearm.
The PCs could be hired to hijack Nash's cargo. If he get's in trouble, maybe ole Nash'll try to toss a grenade into a PCs open car window.