- - - 2012 GMC Sierra 1500 2WD Ext Cab 143.5" SL - REAR AXLE, 3.23 RATIO ,EMISSIONS, FEDERAL REQUIREMENTS ,ENGINE, VORTEC 4.8L VARIABLE VALVE TIMING V8 SFI FLEXFUEL ,GVWR, 6800 LBS. (3084 KG) ,TRANSMISSION, 4-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED ,LPO, ON THE JOB PACKAGE ,CUSTOMER DIALOGUE NETWORK Power Windows, Power Door Locks, Tilt Wheel, Remote Keyless Entry, Cruise Control, Communications-Onboard Hands Free, Tire-Pressure Monitoring System, Security System, AM/FM Stereo, CD Player, Audio-Satellite Radio, MP3 Sound System, Tinted Glass - Deep, Additional Power Outlet(s), Air Conditioning, Seats-Front Bench-Split, Seat-Lumbar-Driver, Floor Mats-Front, Cloth Seats, Mirrors-Pwr Driver, Heated Side Mirrors, Mirrors-Vanity-Passenger, Wheels-Chrome, Transmission-Overdrive-Switch, Headlights-Auto-Off, Reading Lamps-Front, Air Bag - Driver, Air Bag - Passenger, Air Bags - Head, Air Bag - Side, Air Bag-Side-Head only-Rear, Traction Control, Power Steering, Front Disc Brakes, Brakes-ABS-4 Wheel, Intermittent Wipers, Daytime Running Lights