How much horsepower does a 1997 GMC Sierra 1500 engine 5.7 L V8 have?
About 255 horsepower.
The 1997 GMC Sierra 1500, equipped with the 5.7-liter V8 (often branded as the Vortec 5700 in later years), delivered that figure as the SAE net horsepower rating for that model year. This engine produced roughly 330 lb-ft of torque, helping the truck handle work tasks, towing, and everyday driving across the era. The following overview provides context for what that horsepower means in daily use and how it fit into the Sierra lineup of the time.
Engine profile and performance
To understand the horsepower figure, it helps to know where the engine fit within GM's lineup and how power was delivered. The 5.7 L V8 in the 1997 Sierra 1500 is part of GM’s small-block family, commonly associated with the Vortec 5700 branding that appeared in late 1990s trucks. In 1997, it was rated at 255 hp (SAE net) at about 4,600 rpm, with torque near 330 lb-ft available around 3,200–3,600 rpm. It used sequential multi-point fuel injection to optimize efficiency and performance across a range of driving conditions.
Key specifications for the 5.7 L V8 in the 1997 Sierra 1500 are summarized below:
- Displacement: 5.7 L (350 cu in) V8
- Engine family: GM small-block, Vortec 5700
- Fuel system: Sequential multi-point fuel injection
- Horsepower: 255 hp SAE net at 4,600 rpm
- Torque: 330 lb-ft SAE net at 3,200–3,600 rpm
- Typical transmission pairing: 4-speed automatic (4L60-E) in most configurations; manual options were limited to certain trims
These specifications illustrate how the 5.7 L V8's 255 hp translated into the Sierra 1500’s on-road performance, including respectable acceleration for a full-size pickup and solid towing capability for the period.
Measurement context and variations
Horsepower figures for 1997 trucks are SAE net horsepower, which accounts for accessories and standard equipment installed on the vehicle. Earlier GM literature sometimes cited gross horsepower, which was higher. For this reason, some historical references may show different figures when comparing older catalogs or non-SAE testing. The 255 hp rating reflects the standard, factory-installed configuration for most 1997 Sierra 1500 trucks.
Context within the model year
During the 1997 model year, the Sierra 1500 offered a blend of power, durability, and capability that appealed to customers needing a reliable work truck with usable highway performance. The 5.7 L V8’s output balanced with the truck’s chassis, suspension, and drivetrain to deliver confident pulling power and steady cruising speed, making it a common choice for buyers who required robust everyday performance without sacrificing comfort.
Summary
In summary, the 1997 GMC Sierra 1500 with a 5.7 L V8 produced about 255 horsepower (SAE net) and roughly 330 lb-ft of torque. This combination defined the truck’s performance profile for the era, delivering practical power for everyday driving, towing, and work-related tasks. The engine’s capabilities remain a notable part of the Sierra’s legacy among late-1990s GM pickups.
How much gas mileage does a 1997 GMC Sierra 1500 5.7 get?
1997 GMC Sierra SLT 4WD Wheelbase: 141.5 inches Length: 218 inches Engine: 5.7-liter, 255-h.p. V-8 Transmission: 4-speed automatic EPA mileage: 13 m.p.g. city/17 m.p.g. highway Base price: $20,896 Price as tested: $29,820.
How much horsepower does a 1997 GMC Sierra 1500 5.7 have?
255 horsepower
The 1997 1500 Regular Cab ranges in power from the Short Bed with 200 horsepower to the Long Bed with 255 horsepower.
What is the bad year for the GMC Sierra 1500?
Years to avoid for the GMC Sierra 1500 include 2014-2015 due to numerous electrical and transmission issues, the 2007-2010 period for problems with the Active Fuel Management (AFM) system, and specific recent years like 2020-2022, which had recalls related to 10-speed transmissions and 6.2L V8 engines. Other problematic years to be aware of are 2016-2018, which saw complaints about brake, engine, and transmission problems.
This video explains why you should avoid certain GMC Sierra 1500 models: 59sBig Truck Lovers YouTube · Aug 23, 2025
2014-2015
- Issues: Widespread electrical problems, including glitches with the new infotainment system, dashboard gauges, and the transfer case. Some models had engine knock and failing headlights.
- Other concerns: Some 2014 models were recalled for a fire risk.
2007-2010
- Issues: The early version of GM's Active Fuel Management (AFM) system in models with the 5.3L V8 engine is known for causing issues like oil consumption and engine problems.
2016-2018
- Issues: This period saw a range of complaints, including issues with the braking system (2016), engine problems and stalling (2017), and continued technology and transmission complaints (2018).
2020-2022
- Issues: These years are affected by recalls and service bulletins for the 10-speed transmission, particularly related to the valve body. The 6.2L V8 engine also has issues, with recalls related to the connecting rods and crankshaft.
2021-2024
- Issues: Affected by a massive recall on the 6.2L V8 engine for connecting rod and crankshaft issues.
- Note: GM has extended the warranty on these engines, but parts for the recall may be difficult to get.
Other potential years to watch for
- 2019: Early production models had build quality issues.
- 2005: Some sources cite this year as having a higher-than-average complaint rate, though still conservative.
- 2001: Some early models had brake issues.
- 2017: Has reported engine issues and stalling.
How much is a 1997 GMC Sierra 1500 worth?
1997 GMC Sierra 1500 Value - $822-$4,239 | Edmunds.
