Edmunds.com's review says If you want power, the Sierra's got it., Heated Leather Seats, 4WD, Aluminum Wheels, 4x4, Multi-CD Changer, Premium Sound System, Running Boards, SUSPENSION PACKAGE, OFF-ROAD , ONSTAR PLUS PACKAGE READ MORE... , , KEY FEATURES: Heated Leather Seats,4x4,Running Boards,Premium Sound System , Multi-CD Changer. Keyless Entry,Privacy Glass,Heated Mirrors,Bucket Seats,Electrochromic rearview mirror. , , OPTION PACKAGES: SUNROOF, POWER, TILT-SLIDING , ELECTRIC WITH EXPRESS-OPEN AND WIND DEFLECTOR: includes HomeLink, (UG1) Universal Home Remote,ONSTAR PLUS PACKAGE: includes (U2K) Sound system feature, XM Satellite Radio, (UE1) OnStar, and (UK3) Sound system feature, steering wheel mounted radio controls,SUSPENSION PACKAGE, OFF-ROAD: includes 1.81 (46 mm) shocks, off-road jounce bumpers, stabilizer bars, (NZZ) Skid Plate Package, and Z71 decals on rear quarters. SLT, with Onyx Black with Silver Birch Metallic exterior and Dark Pewter Leather Seats, features a 8 Cylinder Engine with 310 HP at 5200 RPM*. , , EXPERTS ARE SAYING , If you want power, the Sierra's got it. -Edmunds.com. 4 Star Driver Front Crash Rating. 4 Star Rollover Rating.== WARRANTY INCLUDED == Backed by a 6-month/6,000 mile limited Powertrain warranty. This includes emergency towing and roadside assistance, as well as rental car coverage and trip interruption coverage for the duration of warranty. 1