Work Truck trim. TRAILERING EQUIPMENT, HEAVY-DUTY, AUDIO SYSTEM, AM/FM STEREO WITH MP3 C... ONSTAR, 1-YEAR OF SAFE AND SOUND PLAN... 4x4, Alloy Wheels, Tow Hitch, DIFFERENTIAL, HEAVY-DUTY AUTOMATIC LO... REMOTE KEYLESS ENTRY. ======KEY FEATURES INCLUDE: 4x4. ======OPTION PACKAGES: WORK TRUCK PREFERRED PACKAGE includes (K34) cruise control, (AJ1) Solar-Ray deep-tinted glass, (PY2) 4-16 x 6.5 (40.6 cm x 16.5 cm) 8-lug chrome-styled wheels and (T96) fog lamps (Also includes (AU3) power door locks and remote keyless entry on Regular and Extended Cab models. Not available with SEO (5B5) power windows, locks and mirrors.), TRAILERING EQUIPMENT, HEAVY-DUTY includes trailering hitch platform and 2.5-inch receiver with 2 adapter, 7-wire harness (harness includes wires for: park lamps, backup lamps, right turn, left turn, electric brake lead, battery and ground) with independent fused trailering circuits mated to a 7-way sealed connector