Engines

Engine Options for Regular Cab Models  Reg/Ext and Crew Ext and Crew
Cab		 Horsepower Torque (lb-ft.)
Work
Truck		 SLE SLT
Vortec 6.0L Variable Valve Timing SFI V8 Standard Standard Standard 360 380
Vortec 6.0L Variable Valve Timing V8 SFI (Requires pickup box delete) Standard Standard Standard 312 373
DURAMAX 6.6L Turbo Diesel V8 B5 Bio-Diesel compatible (Not available on extended cab models) Available Available Available 365 660

Mechanical

  Reg/Ext and Crew Ext and Crew
Cab
Work
Truck		 SLE SLT
Air cleaner, high-capacity Standard Standard Standard
Alternator, 125 amps Standard Standard Standard
Alternator, 160 amps (Included with Snow Plow Prep Package when Vortec 6.0L V8 is ordered; requires Vortec 6.0L V8 engine) Available Available Available
Alternator, dual, 125 amps each (Included with Snow Plow Prep Package when DURAMAX 6.6L Turbo Diesel engine is ordered; requires DURAMAX 6.6L Turbo Diesel engine) Available Available Available
Battery, heavy duty, 600 cold-cranking amps, maintenance-free with rundown protection and retained accessory power Standard Standard Standard
Battery, auxiliary, heavy duty, 600 cold-cranking amps, maintenance-free (not available with Duramax 6.6L Turbo Diesel engine) Available Available Available
Battery, heavy duty, dual, 730 cold-cranking amps, maintenance-free with rundown protection and retained accessory power (included and only available with Duramax 6.6L Turbo Diesel engine) Available Available Available
Brakes, 4-wheel antilock, 4-wheel disc Standard Standard Standard
Brake Controller, integrated trailer Available Available Available
Cooling, auxiliary external transmission oil cooler, heavy duty air-to-oil Standard Standard Standard
Cooling, external engine oil cooler, heavy-duty air-to-oil, integral to driver side of radiator tank Standard Standard Standard
Differential, heavy duty automatic locking rear Available Available Standard
Engine block heater Available Available Available
Exhaust, aluminized stainless-steel muffler and tailpipe Standard Standard Standard
Frame, hydroformed front section Standard Standard Standard
Skid Plate Package, frame-mounted shields, includes front underbody shield starting behind front bumper and running to first cross-member, protecting front underbody, oil pan, differential case and transfer case Available Available Available
Snow Plow Prep Package, includes 15-amp power for backup and roof emergency light, high-flow front bumper, forward lamp wiring harness, Provision for cab roof mounted lamp/beacon, instrument panel jumper wiring harness for electric trailer brake controller and Skid Plate Package Available Available Not Available
StabiliTrak, stability control system with Proactive Roll Avoidance (Requires Extended Cab or Crew Cab models) Standard Standard Standard
Steering, power, recirculating-ball Standard Standard Standard
Suspension, front, independent torsion-bar Standard Standard Standard
Suspension, rear, 2-stage multileaf semi-elliptic springs Standard Standard Standard
Suspension Package, Handling/Trailering, heavy-duty includes 35mm twin tube shock absorbers and 36mm front stabilizer bar Standard Standard Standard
Suspension Package, Off-Road, includes 35mm deflective disk twin tube shock absorbers, off-road jounce bumpers, 36 front stabilizer bar, heavy-duty automatic locking rear differential, skid plate package and Z71 decals on rear quarters Not Available Available Available
Switch, High Idle 1 - Requires (K34) cruise control. Available Available Available
Transfer Case, with floor-mounted shifter (4WD models only) Standard Not Available Not Available
Transfer Case, electronic shift with rotary-dial controls (4WD models only) Not Available Standard Standard

Transmission

  Reg/Ext and Crew Ext and Crew
Cab
Work
Truck		 SLE SLT
Rear axle, 3.73 ratio Standard Standard Standard
Rear axle, 4.10 ratio (available only with Vortec 6.0L V8) Available Available Available
Transmission, 6-speed automatic, heavy-duty, electronically controlled with overdrive and tow/haul mode (requires Vortec 6.0 V8 engine) Standard Standard Standard
Transmission, Allison 1000 6-speed automatic, electronically controlled with overdrive, electronic engine grade braking and tow/haul mode (requires DURAMAX 6.6L Turbo Diesel engine) Available Available Available

Steering

Turning Diameter  Regular
Cab		 Extended Cab Crew Cab
Long Box Standard
Box		 Long Box Standard
Box		 Long Box
Turning diameter, curb-to-curb, ft 45.3 47.6 52.5 51.2 55.1
Features  Reg/Ext and Crew Ext and Crew
Cab
Work
Truck		 SLE SLT
StabiliTrak, stability control system with Proactive Roll Avoidance Standard Standard Standard
Steering, power recirculating ball Standard Standard Standard
Suspension, front, independent, torsion bar Standard Standard Standard
Suspension, rear, 2-stage multileaf springs semi-elliptic Standard Standard Standard
Suspension Package, Handling/Trailering, heavy-duty includes 35mm twin tube shock absorbers and 36mm front stabilizer bar Standard Standard Standard
Suspension Package, Off-Road, includes 35mm deflective disk twin tube shock absorbers, off-road jounce bumpers, 36 front stabilizer bar, heavy-duty automatic locking rear differential, skid plate package and Z71 decals on rear quarters Not Available Available Available
Transfer case, with floor-mounted shifter (standard with 4WD models only) Standard Not Available Not Available
Transfer case, electronic shift with rotary-dial controls (4WD models only) Not Available Standard Standard

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