TRAILERING EQUIPMENT, HEAVY-DUTY, Satellite Radio, 4x4, Turbo, Alloy Wheels, Tow Hitch, Onboard Communications System. AND MORE!KEY FEATURES INCLUDE4x4, Satellite Radio, Onboard Communications System, Chrome Wheels. Privacy Glass, Electronic Stability Control, 4-Wheel ABS, 4-Wheel Disc Brakes, Tire Pressure Monitoring System. GMC SLE with Silver Birch Metallic exterior and Ebony interior features a 8 Cylinder Engine with 365 HP at 3200 RPM*.OPTION PACKAGESENGINE, DURAMAX 6.6L TURBO DIESEL V8 B5-Diesel compatible (365 hp [271.7 kW] @ 3200 rpm, 660 lb-ft of torque [894.6 N-m] @ 1600 rpm) Includes (TUV) heavy-duty dual, 730 cold-cranking-amp battery and (K05) engine block heater), TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode, CONVENIENCE PACKAGE includes (JF4) adjustable power pedals, (UG1) Universal Home Remote, (AP3) remote vehicle starter system, (UD7) Rear Parking Assist, (C49) rear-window defogger, (DD8) inside rearview auto-dimming mirror and (DL3) outside heated power-adjustable, power-folding mirrors, SLE PREFERRED PACKAGE includes (UK3) steering wheel controls, (CJ2) dual-zone automatic air conditioning, (AG1) 6-way power driver seat adjuster, (UPF) Bluetooth® for phone, (T96) fog lamps, (A60) locking tailgate and (PPA) EZ-Lift tailgate, 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, wiring harness for after-market trailer brake controller (located in the instrument panel harness), (JL1) integrated trailer brake controller and single wire for center high-mounted stop lamp, DIFFERENTIAL, HEAVY-DUTY AUTOMATIC LOCKING REAR, MIRRORS, OUTSIDE HEATED POWER-ADJUSTABLE VERTICAL CAMPER MANUAL-FOLDING AND EXTENSION, BLACK includes integrated turn signal indicators consisting of 50 square inch flat mirror surface positioned over a 20 square inch convex mirror surface with a common head and lower convex spotter glass (convex glass is not heated or power adjustable), REMOTE VEHICLE STARTER SYSTEM includes Remote Keyless Entry, SEATS, FRONT 40/20/40 SPLIT-BENCH, 3-PASSENGER, DRIVER AND FRONT PASSENGER MANUAL RECLINING center fold-down armrest with storage, lockable storage compartment in seat cushion (includes auxiliary power outlet), adjustable outboard head restraints and storage pockets on Extended and Crew Cab models (STD), AUDIO SYSTEM, AM/FM STEREO WITH MP3 COMPATIBLE CD PLAYER seek-and-scan, digital clock, auto-tone control, Radio Data System (RDS), speed-compensated volume and TheftLock (STD).EXPERTS ARE SAYINGEdmunds.coms review says The GMC Sierra HD raised the bar in ride quality and refinement when redesigned for the 2007 model year..Horsepower calculations based on trim engine configuration. Please confirm the accuracy of the included equipment by calling us prior to purchase.