GMT400 Vs GMT800 Pickup Truck

GMT400 Vs GMT800 Pickup Truck – Comparison With Pros And Cons

General Motors, one of the globally leading and giant automotive manufacturing companies, has manufactured many top-notch pickup trucks. And if you are talking about full-size pickup trucks made by the company, you cannot help but mention the GMT400 and GMT800. But if you compare the GMT400 vs GMT800, which one do you think will turn out to be a better choice?

When it comes to performance, both GMT400 and GMT800 are very reliable and excellent performers. However, the GMT400 is more of an older version of a pickup truck compatible with older-generation engines. On the other hand, the GMT800 is more upgraded, with modern features, more convenient, and more expensive.

Both GMT400 and GMT800 vehicles are no longer in production. But in case you come across them and want to decide to get one, you must know how to tell which one should be an ideal choice. In that case, make sure to read this article to learn more about them and compare the features like a pro.

GMT400 Vs GMT800: Comparison Table

Generation3rd Generation4th Generation
EngineOlder generation engineModern generation engine
Transmission3-Speed Automatic4-Speed Automatic
Fuel EfficiencyLess efficient More efficient
Towing CapacityUp to 7,500 lbs.Up to 10,500 lbs.
ProductionDiscontinued Discontinued 
AvailabilityOnly available usedOnly available used
CostLess expensive More expensive

GMT400 Vs GMT800: Detailed Comparison

As you can see from the comparison table above, the GMT400 is from the 3rd generation GM vehicle with a rounded styled feature. On the other hand, the GMT800 is a 4th generation and upgraded model with more robust parts and performance.

Here is a more detailed comparison between the two generations of pickup trucks to help you understand them better.


Let’s start with the design and appearance of the vehicles. The GMT400 has more of a rounded and boxy design with squared-off edges. This gives the vehicles an oldie vibe. On the other hand, the GMT800 has a more modern and stylish appearance. 



The GMT800 has a more powerful engine capacity and components. While the GMT400 has 3-speed automatic transmission, the GMT800 has a 4-speed automatic transmission with higher torque ratings. That is why the GMT800 offers more powerful components and performance and is suitable for heavy-duty work.

Fuel Efficiency

With a 5.7 V8 engine, the GMT400 runs 13 mpg in the city and 16 mpg on the highway. On the other hand, with a 5.3 V8 engine, the GMT800 has a fuel economy of 14 mpg in the city and 18 mpg on the highway. So you can tell that the GMT800 has a better fuel economy in every way.

Towing Capacity

With all the robust and powerful components, the GM800 has a better towing capacity than the GMT400. The GMT400 can tow up to 7,500 lbs. load, while the GMT800 can tow up to 10,500 lbs. 

Safety Features

Both GMT400 and GMT800 have various safety features for a reliable driving experience. However, the GMT800 has more advanced and modern safety features, such as traction control, side airbags, ABS brakes, etc.

Aftermarket Support

So what about aftermarket support for both of these vehicle types? Well, since the GMT400 is an older model, it has wider aftermarket support. You can easily find its replacement or modification parts. Though the aftermarket support for the GMT800 is not the same as the GMT400, it still has a wide range of replacement parts and modification components available. 


Though these vehicles seem like two of the best ones you could have, unfortunately, they are no longer in production. That means GMT400 and GMT800 are no longer available in the market. But you can still find them in the used market. And as GMT800 is more recent, you can find it more easily than the GMT400.



The cost of the GMT400 and GMT800 are not the same, and they depend on various factors. The cost can vary based on your location, vehicle model, seller or retailer type, vehicle condition, mileage, and all.

That is why it is hard to say the exact price of the pickup trucks. Anyway, the GMT400 may cost around $4,000 to $15,000, while the GMT800 can cost around $15,000 to $40,000 because of its modern appearance and more powerful performance.

Pros And Cons Of GMT400 

Here are the pros and cons of the GMT400-


  • Classic body gives off a vintage appearance
  • Wider aftermarket support
  • More affordable option compared to GMT800
  • Various engine options available, including diesel engine


  • Lower fuel efficiency 
  • Less advanced technology
  • Only available as used

Pros And Cons Of GMT800 

Here are the pros and cons of the GMT800-


  • Modern and stylish appearance 
  • More fuel efficiency compared to GMT400
  • More towing capacity compared to GMT400
  • Comes with more advanced safety features
  • More easily found in the used market


  • More expensive 
  • Aftermarket support is not as wide as the GMT400
  • Only available as used

Frequently Asked Questions

Q. In what year the GMT400 and GMT800 were produced?

The GMT400 was produced from 1988 to 1998. On the other hand, the GMT800 vehicles were produced from 1999-2006. The GMT400 vehicles were the 3rd generation GM pickup truck model, whereas the GMT800 vehicles were the 4th.

Q. What engines are used in the GMT400 and GMT800?

The GMT400 used various ranges of engines, such as 4.3L V6, 5.0L V8, 5.7L V8, 6.5L diesel engine V8, and 7.4L V8. The GMT800 also uses various ranges of engines, such as 4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8, and 8.1L V8.

Q. Are the GMT400 and GMT800 still available?

Unfortunately, no. Both GMT400 and GMT800 are no longer in production. But you may still find used ones available.

Q. How much do the GMT400 and GMT800 cost?

The cost of both pickup trucks depends on their models, built years, overall condition, performance, locations, and more. Nevertheless, since the GMT800 offers more updated models, this generation of pickup trucks costs more than the GMT400. Even though it is impossible to find new models of these vehicles, the price difference may still apply even if you buy used ones.

Final Words

Even though the GMT400 and GMT800 are not available as new, people are still eager to purchase the used ones because of the vehicles’ capacity and performance. So if you are planning the same, I hope this GMT400 vs GMT800 comparison article has given you a good idea.

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