What Engine Is In A 2004 Duramax?

Is a 2003 Duramax an LB7?

Manufactured Years: 2001-2004
Fuel Tank Size: 26 Gallons
Max Engine Speed: 3,250 RPM
Horsepower: 235-300 horsepower
Torque: 500-520 lb/ft of torque

Specifications for the 6.6L LB7 Duramax engine

Manufactured Years: 2001-2004
Engine Design: 6.6L 90-Degree V8 Turbocharged Diesel
Transmission: 5-Speed Auto Allison Transmission
Vin Identification: (8th Digit) 1
Displacement: 6.6 Liters or 403 Cubic Inches

What kind of engine is a Duramax?

OHV 4 valves per cylinder This line of 6.6 liter Diesel V8 engines is manufactured in Moraine, Ohio, by DMAX, a joint venture between General Motors and Isuzu. The Duramax V8 engine was developed by DMAX, a joint venture between General Motors and Isuzu. The Defiance GM Powertrain foundry in Defiance County, Ohio, is where the Duramax block and heads are forged and cast.

How much horsepower does a 2004 Duramax 6600 have?

Speculation and discussions with industry insiders dating back to the autumn of 2001 suggested that a 340 horsepower Duramax 6600 will be introduced for the 2004 model year. Even as recently as a year ago, a Duramax with 360 horsepower came up in a debate.

When did the Duramax come out in the USA?

This was first debuted in 2006 and was only available in the ‘classic’ body type until it was discontinued in 2007. It features a better engine computer tune than the 2005 LLY version of the engine, which results in greater power and torque over the previous model. The Duramax made its first appearance in the Express/Savanna vans in 1998.

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Do Duramax engines have a lot of head gasket problems?

In comparison to other models of the Duramax engine, the LB7 Duramax is more prone to head gasket failure. Despite this, head gasket failure does not often occur until the engine has traveled more than 100,000 miles, making it far less prevalent than in 6.0L Powerstroke engines.

Is a 2004 Duramax a lly?

LLY is the designation assigned to Duramax engines seen in HD vehicles manufactured in 2004 and 2005. Despite the fact that they made significant improvements to the LB7 motor between 2001 and 2004, there are a few key modifications that every owner should consider. (This is supposing that an LLY owner want higher power, lower EGTs, and improved efficiency.)

What kind of motor is in a 2004 Duramax?

An intercooled, four-valve-per-cylinder V-8 engine with direct injection and turbocharging produces 300 horsepower and 560 pound-feet of torque, and it is available in the LB7 Duramax diesel.

What year Duramax is LB7?

RPO LB7 (engine code ‘1’) was originally introduced in 2001 and was in use until the beginning of the 2004 season. It has a 32-valve design with high-pressure common-rail direct injection and an experimental composite design cylinder head, among other features.. The Chevrolet Kodiak/GMC Topkick are two trucks that make use of the LB7.

Is my Duramax a lly or LB7?

If the eighth digit of your VIN number is a 1, your vehicle is an LB7 Duramax engine (the early engine). If the eighth digit is a 2, the letter LLY is represented.

What’s better LLY or LBZ?

Engine and gearbox wise, there is no difference between the lly and the lbz; the ecm has the tune of a 2005 lly with 310 horsepower, not the lbz with 350 horsepower; install a tuner and it won’t make a difference.

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Is the Duramax LLY a good motor?

The LLY is the designation given to the Duramax of the second generation. The LLY Duramax is similar to the LB7 in that it is dependable, powerful, and emits only a fraction of the pollution produced by newer diesel trucks like as the L5P. In contrast to the LB7 trucks, LLY Duramax trucks do not suffer from the same injector failure issues as LB7 trucks had.

Which is better LB7 or LBZ?

Lb7- excellent fuel economy, lower cost, improved sound, injectors that suck, and excellent throttle responsiveness. Lbz- Significantly more power, a quieter engine compartment (but noisy injectors), greater turbo lag, a factory high idle setting that is excellent, and the greatest feature is the 6-speed alli transmission.

What engine is a LB7?

Duramax turbo-diesel engines were developed in collaboration between General Motors and Isuzu and were used in the first-generation Chevrolet Silverado HD and GMC Sierra HD pickup trucks, among other vehicles. Engine: 6.6 Liter LB7 V-8 Duramax Turbo Diesel from General Motors.

Displacement: 6.6L / 403 cu. in.
Successor: LLY Duramax V8
Assembly: Moraine, Ohio, USA

How much horsepower does a 2004 6.6 Duramax have?

Horsepower and torque figures for Duramax engines based on model year

Model Year(s) Horsepower Torque
2004 300 hp @ 3,100 rpm 520 lb-ft @ 1,800 rpm
310 hp @ 3,000 rpm 605 lb-ft @ 1,600 rpm
300 hp @ 3,000 rpm 520 lb-ft @ 1,600 rpm
210 hp @ 2,750 rpm 520 lb-ft @ 1,600 rpm

Are all LB7 engines the same?

All of the lb7’s in trucks are the same size and shape.

Is a LB7 a good engine?

Because it is the original Duramax model, the LB7 continues to be immensely popular among diesel aficionados, despite the fact that it does not have any emissions control components. In general, it is a fairly long-lasting and dependable engine in its class.

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What generation is a 2004 Duramax?

GM Duramax Turbo Diesel Engines are a type of turbo diesel engine that was developed by General Motors.

Engine RPO Code Year In Production Chevrolet Applications
LB7 2001 – 2004 Kodiak, Silverado HD
LLY 2004 – 2005 Silverado HD
LLY/LBZ 2006 – 2007 Kodiak, Silverado HD, Express
LMM 2007 – 2010 Kodiak, Silverado HD, Express

How do I know what LLY Duramax I have?

  • The Duramax engine has grown from the initial LB7 series to include the LLY, LBZ, LMM, LML/LGH, and currently the L5P series.
  • The LLY is the most recent generation of the Duramax engine.
  • The most straightforward method of determining which series of Duramax you have is to look at the truck’s VIN number.
  • In most cases, the 8th digit is the engine ID, which will be one of the following numbers: 1, 2, D, 6, 8, L, or Y (with few exceptions).

How can you tell the difference between LLY LBZ and LB7?

The most straightforward method would be to find the FICM, also known as the fuel injection control module. On the LB7, it is located on the passenger-side valve cover. It was decided to do away with the FICM when the LBZ and the new 32-Bit Bosch system were introduced and installed, respectively. It’s possible that the air intake will appear different as well.

What year was the LLY Duramax?

When the 6.6-liter LLY Duramax V8 engine was released for the 2004 model year, it was a direct replacement for the previous-generation LB7 Duramax V8 engine. This engine was used in the Chevrolet Silverado Heavy-Duty and GMC Sierra Heavy-Duty pickup trucks through 2006, producing up to 310 horsepower and 605 pounds-feet of torque at peak performance.