The 1997 GMC Sierra 1500 with the 5.7-liter V8 produced about 255 horsepower in stock form.
That engine—GM's Vortec 350 family—was rated at 255 hp (SAE net) at 4,600 rpm and about 330 lb-ft of torque at 2,800 rpm. The rating reflects factory specifications for the model year; on-road results can vary with exhaust, drivetrain, and emission equipment.
Engine specs and context
The following figures summarize the 5.7 L V8 used in most Sierra 1500s of that era. It’s commonly referred to as the Vortec 350, part of GM's mid-1990s small-block lineup.
Before listing the key numbers, note that horsepower ratings from that period used SAE net standards, which include typical accessories and emissions equipment.
- Displacement: 5.7 L (350 cubic inches)
- Horsepower: 255 hp (SAE net) @ 4,600 rpm
- Torque: 330 lb-ft @ 2,800 rpm
- Engine family/Code: Vortec 350 (RPO L31)
- Identification: Commonly found in 1996–1999 GM trucks and SUVs
These numbers represent the standard configuration for the 1997 Sierra 1500. Some variations could occur due to market-specific emissions equipment, exhaust setup, or drivetrain differences.
Notes on measurement and variability
Horsepower ratings are taken from SAE net measurements used by GM in the late 1990s. Real-world performance may differ due to factors such as the exhaust system, air intake, maintenance status, and the vehicle's model year alignment with emissions rules.
In summary, the 1997 GMC Sierra 1500's 5.7 L V8 is rated at 255 horsepower with 330 lb-ft of torque in stock form.
Summary: The 1997 Sierra 1500's 5.7 L V8 (Vortec 350) delivers about 255 horsepower and 330 lb-ft of torque in factory trim, reflecting GM's specifications for that year.
How much horsepower does a 1997 GMC Sierra 1500 5.7 have?
255-h.p.
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.
Is the 1997 Sierra 1500 a good work truck?
Review Summary
The vehicle is described as an excellent and highly reliable product, with praise for its great performance, power, and durability. Customers highlight the truck's strong engine, smooth handling, and long-lasting nature, as well as its functionality including towing capacity and storage space.
What is the 1997 GMC Sierra 1500 known for?
The 1997 GMC Sierra 1500 is highly regarded for its reliability and durability. Owners consistently emphasize the truck's ability to run well even after surpassing high mileage benchmarks, often well beyond 200,000 miles.
What years to avoid for a GMC Sierra 1500?
The GMC Sierra 1500 years to avoid are 2014, 2015, 2016, and many early 1992 to 2002 models. The best years include 2004, 2009, 2018, 2021, and 2022.