Comparison GMC Sierra 2500HD III (GMT900) Extended Cab Long Box 6.6 Duramax TD V8 (365 Hp) Automatic & GMC Acadia I (facelift 2013) 3.6 V6 (281 Hp) Automatic & GMC Sierra 3500HD V (GMTT1XX) Crew Cab Long Bed 6.6 V8 (401 Hp) SRW Automatic
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| Brand: | GMC | GMC | GMC |
| Model: | Sierra 2500HD | Acadia | Sierra 3500HD |
| Generation: | Sierra 2500HD III (GMT900) Extended Cab Long Box | Acadia I (facelift 2013) | Sierra 3500HD V (GMTT1XX) Crew Cab Long Bed |
| Engine / modification: | 6.6 Duramax TD V8 (365 Hp) Automatic | 3.6 V6 (281 Hp) Automatic | 6.6 V8 (401 Hp) SRW Automatic |
| Production start: | 2007 year | 2015 year | 2020 year |
| Production end: | 2010 year | 2016 year | 2023 year |
| Coupe type: | Pick-up | Pick-up | |
| Powertrain Architecture: | Internal Combustion engine | Internal Combustion engine | |
| Num. of Doors: | 2 | 5 | 4 |
| Num. of seats: | 5 | 7-8 | 5 |
| Fuel consumption / economy - urban: | 13.8 l/100 km | ||
| Fuel consumption / economy - extra urban: | 9.8 l/100 km | ||
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 129 l | 83 l | 136 l |
| Power: | 365 hp | 281 hp | 401 hp |
| Max power in: | 3200 rpm. | 6300 rpm. | 5200 rpm. |
| Torque: | 895 Nm @ 1600 rpm. | 361 Nm @ 3400 rpm. | 629 Nm @ 4000 rpm. |
| Model Engine: | Duramax LMM | LLT | L8T |
| Engine position: | Front, transverse | ||
| Engine displacement: | 6599 cm3 | 3564 cm3 | |
| Engine oil capacity: | 9.5 l | 5.7 l | 7.6 l |
| Coolant: | 24 l | 11.3 l | 14.6 l |
| Fuel System: | Direct injection | ||
| Maximum engine speed: | 3450 rpm. | 6700 rpm. | |
| Aspiration / Turbine: | Naturally aspirated engine | ||
| Position of cylinders: | V engine | ||
| Valvetrain: | OHV | DOHC | OHV, VVT |
| Number of cylinders: | 8 | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 | 2 |
| Compression ratio: | 16.8 | 11.3 | 10.8 |
| Piston Stroke: | 99 mm | 85.6 mm | 98 mm |
| Cylinder Bore: | 103 mm | 94 mm | 103.25 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 6 Hydra-Matic | ||
| Length: | 6330 mm | 5100 mm | 6759 mm |
| Width: | 2004 mm | ||
| Width including mirrors: | 2436 mm | 2079 mm | |
| Height: | 1930 mm | 1844 mm | 2049 mm |
| Wheelbase: | 4001 mm | 3020 mm | 4369 mm |
| Front track: | 1744 mm | 1709 mm | 1731 mm |
| Rear (Back) track: | 1676 mm | 1704 mm | 1736 mm |
| Ride height(clearance): | 243 mm | 193 mm | 283 mm |
| Minimum volume of Luggage (trunk): | 682 l | ||
| Maximum amount of Luggage (trunk): | 2138 l | 3288 l | |
| Front suspension: | Independent torsion bar, double wishbone | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Multi-link independent | ||
| Max weight: | 4173 kg | 2908 kg | 4672 kg |
| Front brakes: | Ventilated discs | ||
| Rear brakes: | Ventilated discs | ||
| Kerb Weight: | 2915 kg | 2112 kg | 3075 kg |
| ABS: | yes | ||
| Steering type: | Cone worm with recirculation balls | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 16 m | 12.3 m | |
| Permitted trailer load with brakes (12%): | 5897 kg | 2359 kg | 6577 kg |
| Tire size: | 245/75 R16; 265/75 R17 | 255/65 R18; 255/60 R19; 255/55 R20 | 265/70 R17; 245/75 R17; 275/70 R18 |
| Wheel rims size: | 6.5J x 16; 7.5J x 17 | 7.5J x 18; 8J x 19; 7.5J x 20 | 7.5J x 17; 8J x 18 |