Comparison GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 V8 (401 Hp) Automatic & GMC Sierra 2500HD III (GMT900) Regular Cab Long Box 6.6 Duramax TD V8 (365 Hp) Automatic & GMC Sierra HD Crew Cab Standard Box 3500 6.6 TD V8 (445 Hp) 4WD SRW Automatic
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| Brand: | GMC | GMC | GMC |
| Model: | Sierra 2500HD | Sierra 2500HD | Sierra 2500HD |
| Generation: | Sierra 2500HD V (GMTT1XX) Double Cab Long Bed | Sierra 2500HD III (GMT900) Regular Cab Long Box | Sierra HD Crew Cab Standard Box |
| Engine / modification: | 6.6 V8 (401 Hp) Automatic | 6.6 Duramax TD V8 (365 Hp) Automatic | 3500 6.6 TD V8 (445 Hp) 4WD SRW Automatic |
| Production start: | 2020 year | 2007 year | 2018 year |
| Production end: | 2023 year | 2010 year | |
| Coupe type: | Pick-up | Pick-up | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | Internal Combustion engine | |
| Num. of Doors: | 4 | 2 | 4 |
| Num. of seats: | 5 | 2 | 5 |
| Fuel Type: | Petrol (Gasoline) | Diesel | Diesel |
| Fuel tank volume: | 136 l | 129 l | 136 l |
| Power: | 401 hp | 365 hp | 445 hp |
| Max power in: | 5200 rpm. | 3200 rpm. | 2800 rpm. |
| Torque: | 629 Nm @ 4000 rpm. | 895 Nm @ 1600 rpm. | 1234 Nm @ 1600 rpm. |
| Model Engine: | L8T | Duramax LMM | DURAMAX L5P |
| Engine position: | Front, longitudinal | ||
| Engine displacement: | 6599 cm3 | 6588 cm3 | |
| Engine oil capacity: | 7.6 l | 9.5 l | 9.5 l |
| Coolant: | 14.6 l | 24 l | |
| Fuel System: | Diesel Commonrail | ||
| Maximum engine speed: | 3450 rpm. | ||
| Aspiration / Turbine: | Naturally aspirated engine | Turbocharger | |
| Position of cylinders: | V engine | ||
| Valvetrain: | OHV, VVT | OHV | |
| Number of cylinders: | 8 | 8 | 8 |
| Number of valves per cylinder: | 2 | 4 | 4 |
| Compression ratio: | 10.8 | 16.8 | 16 |
| Piston Stroke: | 98 mm | 99 mm | 99 mm |
| Cylinder Bore: | 103.25 mm | 103 mm | 103 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 6 | ||
| Length: | 6514 mm | 5708 mm | 6083 mm |
| Width including mirrors: | 2079 mm | 2032 mm | 2045 mm |
| Height: | 2027 mm | 1939 mm | 1988 mm |
| Wheelbase: | 4127 mm | 3378 mm | 3904 mm |
| Front track: | 1731 mm | 1744 mm | |
| Rear (Back) track: | 1736 mm | 1676 mm | |
| Ride height(clearance): | 258 mm | 243 mm | |
| Maximum amount of Luggage (trunk): | 2138 l | 1727 l | |
| Front suspension: | Independent torsion bar, double wishbone | Torsion | |
| Rear suspension: | The spring | ||
| Max weight: | 4627 kg | 4173 kg | 5216 kg |
| Front brakes: | Ventilated discs | ||
| Rear brakes: | Ventilated discs | ||
| Kerb Weight: | 2967 kg | 2720 kg | 3435 kg |
| ABS: | yes | ||
| Steering type: | Cone worm with recirculation balls | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | |
| Minimum turning circle (turning diameter): | 13.8 m | ||
| Permitted trailer load with brakes (12%): | 6577 kg | 5897 kg | 5897 kg |
| Tire size: | 265/70 R17; 245/75 R17; 275/70 R18 | 245/75 R16; 265/75 R17 | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size: | 7.5J x 17; 8J x 18 | 6.5J x 16; 7.5J x 17 | 7J x 17; 7.5J x 17; 8J x 18; 8J x 20 |