Comparison GMC Sierra 3500HD III (GMT900, facelift 2011) Extended Cab Long Box 6.6 Duramax TD V8 (397 Hp) DRW Automatic & GMC Sierra 3500HD III (GMT900) Extended Cab Long Box 6.0 V8 (360 Hp) 4WD SRW Automatic & Mercedes-Benz SLK (R172) AMG SLK 55 (422 Hp) G-TRONIC
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| Brand: | GMC | GMC | Mercedes-Benz |
| Model: | Sierra 3500HD | Sierra 3500HD | SLK |
| Generation: | Sierra 3500HD III (GMT900, facelift 2011) Extended Cab Long Box | Sierra 3500HD III (GMT900) Extended Cab Long Box | SLK (R172) |
| Engine / modification: | 6.6 Duramax TD V8 (397 Hp) DRW Automatic | 6.0 V8 (360 Hp) 4WD SRW Automatic | AMG SLK 55 (422 Hp) G-TRONIC |
| Production start: | 2011 year | 2007 year | 2012 year |
| Production end: | 2013 year | 2010 year | 2015 year |
| Coupe type: | Pick-up | Pick-up | Cabriolet |
| Powertrain Architecture: | Internal Combustion engine | Internal Combustion engine | |
| Num. of Doors: | 2 | 2 | 2 |
| Num. of seats: | 5 | 5 | 2 |
| Fuel consumption / economy - urban: | 12.0 l/100 km | ||
| Fuel consumption / economy - extra urban: | 6.2 l/100 km | ||
| Fuel consumption / economy - combined: | 8.4 l/100 km | ||
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 136 l | 129 l | 70 l |
| Emission standard: | Euro 5 | ||
| CO2 emissions: | 195 g/km | ||
| Power: | 397 hp | 360 hp | 422 hp |
| Max power in: | 3000 rpm. | 5400 rpm. | 6800 rpm. |
| Maximum speed: | 250 km/h | ||
| Acceleration from 0 to 100 km/h: | 4.6 sec | ||
| Torque: | 1037 Nm @ 1600 rpm. | 515 Nm @ 4200 rpm. | 540 Nm @ 4500 rpm. |
| Model Engine: | Duramax LML | Vortec LY6 | |
| Engine position: | Front, longitudinal | ||
| Engine displacement: | 6599 cm3 | 5967 cm3 | 5461 cm3 |
| Engine oil capacity: | 9.5 l | 5.7 l | |
| Coolant: | 24 l | 15.5 l | |
| Fuel System: | Direct injection | ||
| Maximum engine speed: | 3000 rpm. | 6000 rpm. | |
| Aspiration / Turbine: | Naturally aspirated engine | Turbocharging | |
| Position of cylinders: | V engine | ||
| Valvetrain: | OHV | OHV | |
| Number of cylinders: | 8 | 8 | 8 |
| Number of valves per cylinder: | 4 | 2 | |
| Compression ratio: | 16 | 9.6 | 12.6 |
| Piston Stroke: | 99 mm | 92 mm | |
| Cylinder Bore: | 103 mm | 101.6 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC PLUS | ||
| Length: | 6337 mm | 6330 mm | 4134 mm |
| Width: | 1810 mm | ||
| Width including mirrors: | 2436 mm | 2436 mm | |
| Height: | 1966 mm | 1927 mm | 1301 mm |
| Wheelbase: | 4018 mm | 4001 mm | 2430 mm |
| Front track: | 1748 mm | 1742 mm | 1559 mm |
| Rear (Back) track: | 1906 mm | 1676 mm | 1565 mm |
| Ride height(clearance): | 221 mm | 233 mm | |
| Minimum volume of Luggage (trunk): | 225 l | ||
| Maximum amount of Luggage (trunk): | 2138 l | 2170 l | 335 l |
| Front suspension: | Independent torsion bar, double wishbone | Independent torsion bar, double wishbone | Independent multi-link |
| Rear suspension: | Multi-link independent | ||
| Max weight: | 5908 kg | 4490 kg | 1910 kg |
| Front brakes: | Ventilated discs | ||
| Rear brakes: | Disc | ||
| Kerb Weight: | 3373 kg | 2791 kg | 1610 kg |
| ABS: | yes | ||
| Steering type: | Cone worm with recirculation balls | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Electric Steering | ||
| Minimum turning circle (turning diameter): | 16.1 m | 16 m | 10.53 m |
| Permitted trailer load with brakes (12%): | 7484 kg | 5488 kg | |
| Tire size: | 235/80 R17; 265/70 R18 | 265/75 R16; 265/70 R17; 225/75 R17 | 235/40 R18 |
| Wheel rims size: | 6.5J x 17; 7J x 16; 7.5J x 17 | R18 |