Click on image to view the full photo gallery
GMC Sierra 1500 III (GMT900) Extended Cab Long Box 5.3 Vortec V8 (320 Hp) Automatic FlexFuel
Overall Rating
GMC Sierra 1500:
The Chevrolet Silverado is a range of trucks manufactured by General Motors under the Chevrolet brand. Introduced for the 1999 model year, the Silverado is the successor to the long-running Chevrolet C/K model line. Taking its name from the top trim level from the Chevrolet C/K series, the Silverado is offered as a series of full-size pickup trucks, chassis cab trucks, and medium-duty trucks. The fourth generation of the model line was introduced for the 2019 model year.
The Chevrolet Silverado shares mechanical commonality with the identically related GMC Sierra; GMC ended the use of the C/K nomenclature a model generation prior to Chevrolet. In Mexico, high-trim level versions of the Silverado use the Chevrolet Cheyenne name Starting with the LT trim. Standard and "Custom" trims are still called Silverado. Competing against the Ford F-Series, Ram pickup, Toyota Tundra, and Nissan Titan, the Silverado is among the best-selling vehicles in the United States, having sold over 12 million trucks since its introduction in 1998 as a 1999 model year....(Read more on Wikipedia)
III (GMT900) Extended Cab Long Box Overview:
GMC Sierra 1500 (III (GMT900) Extended Cab Long Box). With 461 Nm of torque, it offers ample pulling power. At around 2378 kg, it’s on the heavier side. Rear‑wheel drive offers dynamic handling and sporty feedback. A vehicle with an open cargo bed at the back, suitable for transporting goods. With seating for 6, it’s perfect for larger families.
5.3 Vortec V8 (320 Hp) Automatic FlexFuel Verdict:
Performance Verdict
A well-balanced engine offering strong performance for daily driving and moderate towing, benefiting from FlexFuel capability.
Fuel Economy
Typical for a large V8 truck, fuel economy is moderate at best, especially when utilizing its full power.
Pros and Cons:
Pros:
- • Powerful and diverse V8 engine lineup for various needs.
- • Excellent towing and hauling capabilities.
- • Spacious and comfortable Extended Cab interior.
- • Robust and durable GMT900 platform.
- • Available FlexFuel options for fuel versatility.
Cons:
- • Poor fuel economy across all engine options.
- • Interior design, while functional, can feel dated compared to rivals.
- • Large size can make city driving and parking challenging.
- • Ride quality can be firm, especially when unladen.
- • Rear drum brakes on some trims are a drawback.
Specifications:
Specifications are compared to those of the previous generation(II (GMT800): 2002 - 2007).
| General: | |
|---|---|
| Brand: | GMC |
| Model: | Sierra 1500 |
| Generation: | III (GMT900) Extended Cab Long Box |
| Modification (Engine): | 5.3 Vortec V8 (320 Hp) Automatic FlexFuel |
| Start of production: | 2007 |
| End of production: | 2010 |
| Powertrain Architecture: | Internal Combustion engine |
| Body type: | Pick-up |
| Seats: | 6 |
| Doors: | 2 |
| Engine: | |
|---|---|
| Power: | 320 Hp @ 5200 rpm. Same horsepower |
| Power per litre: | 60.1 Hp/l [1164mm more] |
| Torque: | 461 Nm @ 4200 rpm. |
| Engine Model/Code: | LMG More details about the engine LMG |
| Engine displacement: | 5328 |
| Number of cylinders: | 8 |
| Engine configuration: | V-engine |
| Number of valves per cylinder: | 2 |
| Fuel injection system: | Multi-port manifold injection |
| Engine aspiration: | Naturally aspirated engine |
| Valvetrain: | OHV |
| Engine oil capacity: | 5.7 l |
| Coolant: | 14.1 l |
| Engine layout: | Front, Longitudinal |
| Cylinder Bore: | 96.01 mm mm |
| Piston Stroke: | 91.95 mm mm |
| Compression ratio: | 9.9:1 |
| Maximum engine speed: | 6000 rpm. |
| Performance: | |
|---|---|
| Fuel Type: | Petrol / Ethanol - E85 |
| Fuel consumption (economy) - urban: | 16.8 l/100 km |
| Fuel consumption (economy) - extra urban: | 11.8 l/100 km |
| Weight-to-power ratio: | 7.4 kg/Hp, 134.6 Hp/tonne |
| Weight-to-torque ratio: | 5.2 kg/Nm, 193.9 Nm/tonne |
| Space: | |
|---|---|
| Kerb Weight: | 2378 |
| Max. weight: | 3130 |
| Max load: | 752 |
| Trunk (boot) space - maximum: | 2138 l |
| Permitted trailer load with brakes (12%): | 4309 kg |
| Fuel tank capacity: | 128 l |
| Size: | |
|---|---|
| Ramp-over (brakeover) angle: | 18° |
| Length: | 6325 mm mm [1164mm more] |
| Width: | 2029 mm mm [35mm more] |
| Height: | 1870 mm mm [62mm more] |
| Wheelbase: | 4001 mm mm [978mm more] |
| Width including mirrors: | 2029 mm |
| Front track: | 1730 mm |
| Rear (Back) track: | 1702 mm |
| Ride height (ground clearance): | 230 mm |
| Minimum turning circle (turning diameter): | 15.6 m [above average] |
| Approach angle: | 16.2° |
| Departure angle: | 22.8° |
| Powertrain: | |
|---|---|
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears | 6 |
| Transmission type | Automatic |
| Gearbox type | Hydra-Matic |
| Front brakes | Disc, 330x30 mm [bad for performance and cooling.] |
| Rear brakes | Drum, 295x60 mm [bad for performance and cooling.] |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/70 R17 |
| Wheel rims size | 7.5J x 17 |
| Front suspension | Independent coil spring |
| Rear suspension | Rigid axle suspension, Leaf spring |
Your first impression of the GMC Sierra 1500 in one word? Go!