The Most Reliable GMC Truck Engine, Ranked

Voting rules: Choose the engine you think is the most reliable!

Updated on May 1, 2024 06:55

Choosing the right engine for a GMC truck can significantly affect longevity and performance. By ranking the most reliable engines, drivers gain insights from collective experiences, helping them make an informed decision based on endurance and efficiency. This live ranking adjusts with new votes, reflecting current opinions and experiences. It encourages a dynamic exchange of information, making it a valuable resource for both existing owners looking to share their insights and potential buyers aiming to make a wise investment.

What Is the Most Reliable GMC Truck Engine?

1

38
votes
Duramax 6.6L V8 Turbo Diesel

General Motors (GM)

This engine is known for its durability and power, making it a popular choice for heavy-duty GMC trucks. It has a proven track record and is capable of towing and hauling large loads.
The Duramax 6.6L V8 Turbo Diesel is a powerful and reliable engine designed for GMC trucks. It is known for its exceptional torque and towing capabilities, making it a popular choice for heavy-duty applications. The engine was developed by General Motors (GM) in partnership with Isuzu Motors and manufactured in Moraine, Ohio.

Displacement: 6.6L

Cylinders: V8

Type: Turbo Diesel

Horsepower: 445 hp

Torque: 910 lb-ft
2

43
votes
5.3L V8 EcoTec3

General Motors

This engine is known for its fuel efficiency and reliability. It is a popular choice for GMC trucks that need a balance between power and efficiency.
The 5.3L V8 EcoTec3 is a powerful and efficient engine designed for GMC trucks. It provides a balance of performance and fuel economy.

Displacement: 5.3L

Number of cylinders: 8

Fuel type: Gasoline

Aspiration: Naturally aspirated

Compression ratio: 11.0:1
3

15
votes
6.2L V8 EcoTec3

General Motors

This engine is the most powerful option available for GMC trucks. It is capable of towing and hauling heavy loads while still providing a smooth ride.
The 6.2L V8 EcoTec3 engine is a powerful and reliable engine designed for GMC trucks. It offers excellent performance and fuel efficiency, making it a popular choice among truck enthusiasts. The engine is manufactured by General Motors (GM), the parent company of GMC.

Displacement: 6.2 liters

Cylinder configuration: V8

Compression ratio: 11.5:1

Horsepower: 420 hp

Torque: 460 lb-ft
4

12
votes
4.3L V6 EcoTec3

General Motors

This engine is known for its reliability and affordability. It is a great choice for GMC trucks that don't need a lot of power but still need to get the job done.
The 4.3L V6 EcoTec3 is an engine produced by General Motors for their GMC trucks. It is part of the EcoTec3 engine family, known for their balance of power and fuel efficiency.

Torque: 305 lb-ft

Fuel Type: Gasoline

Horsepower: 285 HP

Displacement: 4.3L

Configuration: V6
5

13
votes
6.0L V8 Gasoline

General Motors

This engine is a popular choice for GMC trucks that need a lot of power but don't want to pay for a diesel engine. It is known for its reliability and durability.
The 6.0L V8 Gasoline engine is a powerful and dependable engine designed for GMC trucks. With its robust construction and impressive performance, it has become one of the most reliable engine options for GMC truck owners.

Displacement: 6.0 liters

Engine type: V8

Fuel type: Gasoline

Horsepower: 360 hp

Torque: 380 lb-ft
6

13
votes
8.1L V8 Gasoline

General Motors (GM)

This engine is a popular choice for GMC trucks that need a lot of power for towing and hauling. It is known for its reliability and durability.
The 8.1L V8 Gasoline engine is a robust and powerful engine commonly used in GMC trucks. It is known for its reliability and performance, making it a popular choice among truck enthusiasts. The engine was created by General Motors (GM) and offers impressive capabilities for heavy-duty applications.

Displacement: 8.1 liters

Type: V8 gasoline engine

Cylinder configuration: OHV (Overhead Valve)

Power output: 340 horsepower

Torque: 455 lb-ft
7

12
votes
6.5L V8 Turbo Diesel

General Motors (GM)

This engine is known for its durability and longevity. It is a popular choice for older GMC trucks that need a new engine.
The 6.5L V8 Turbo Diesel is an engine designed for GMC trucks. It is known for its reliability and durability, making it a popular choice among truck owners. The engine was developed by General Motors (GM) and was first introduced in the early 1990s. It offers a strong performance and fuel efficiency, making it suitable for both everyday driving and heavy-duty applications.

Displacement: 6.5 liters

Cylinders: V8

Fuel Type: Diesel

Turbocharging: Yes

Horsepower: 180-215 HP
8

7
votes
7.4L V8 Gasoline

This engine is a popular choice for GMC trucks that need a lot of power for towing and hauling. It is known for its reliability and durability.
The 7.4L V8 Gasoline engine is a powerful and reliable engine manufactured by General Motors Corporation (GMC). It was commonly used in GMC trucks during the late 1990s and early 2000s. With its large displacement and V8 configuration, this engine offers a balance of performance and durability for heavy-duty applications.

Displacement: 7.4 liters

Engine type: V8

Fuel type: Gasoline

Horsepower: 230-290 hp

Torque: 385-410 lb-ft
9

9
votes
3.6L V6

General Motors

This engine is known for its smooth performance and fuel efficiency. It is a popular choice for GMC trucks that don't need a lot of power but still need to get the job done.
The 3.6L V6 is a powerful and efficient engine option for GMC trucks. It is known for its reliability and smooth performance.

Displacement: 3.6 liters

Cylinder Configuration: V6

Valvetrain: DOHC

Horsepower: 310 hp

Torque: 275 lb-ft
10

10
votes
2.7L Turbocharged 4-Cylinder

General Motors

This engine is a new option for GMC trucks, but it is already gaining popularity for its balance of power and fuel efficiency. It is a great choice for those who want a smaller engine but still need to tow and haul.
The 2.7L Turbocharged 4-Cylinder engine is a highly reliable and efficient powertrain option for GMC trucks. It is designed to deliver optimum performance and fuel efficiency.

Engine Type: 4-Cylinder Turbocharged

Displacement: 2.7 liters

Horsepower: 310 hp

Torque: 348 lb-ft

Fuel Injection: Direct Injection

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About this ranking

This is a community-based ranking of the most reliable GMC truck engine. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or engine is missing, feel free to help improve the ranking!

Statistics

4351 views
166 votes
10 ranked items

Voting Rules

A participant may cast an up or down vote for each engine once every 24 hours. The rank of each engine is then calculated from the weighted sum of all up and down votes.

More information on most reliable gmc truck engine

When it comes to GMC trucks, the engine is a crucial component that determines its power, efficiency, and durability. Over the years, GMC has produced several engine options for their trucks, each with its own unique features and capabilities. However, if you're in the market for a reliable GMC truck engine, there are a few options to consider. One of the most popular and reliable GMC truck engines is the 6.6L Duramax diesel engine. This engine is known for its impressive towing capacity, fuel efficiency, and durability, making it a popular choice for those who need a heavy-duty truck for work or recreation. The Duramax engine is also equipped with advanced technologies such as a turbocharger and a high-pressure fuel injection system for optimal performance. Another reliable GMC truck engine is the 5.3L V8 engine. This engine is known for its smooth and quiet operation, as well as its fuel efficiency. It's a great option for those who need a truck for daily driving and occasional towing. Overall, the most reliable GMC truck engine will depend on your specific needs and usage. However, the 6.6L Duramax diesel engine and the 5.3L V8 engine are both excellent options to consider when looking for a reliable GMC truck engine.