Top 5 Best LB7 Injectors for 2001-2004 GMC & Chevrolet Models Reviews

Best LB7 Injectors

The 2001-2004 Chevrolet and GMC models powered by Duramax were outstanding. However, they came with faulty injectors. The original injectors cracked easily and did not fit properly. If a Chevrolet or GMC car shows such problems with its injector, you should upgrade to a more worthy replacement injector. There are many replacement brands, but five particularly stand out for their superior quality and performance.

Here is a review of the 5 best LB7 injectors for Duramax. You will also get to learn about how to pick the best one for any car.

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Top 5 Best LB7 Injectors for Duramax Reviews 2020

1. Bosch LB7 New Injector

Bosch LB7 New InjectorBosch is one of the leading manufacturers of diesel engine injection systems. The brand’s replacement products are designed according to the original standards. In this case, however, the Bosch LB7 injector is uniquely designed to compensate for the original injectors’ shortcomings.

These injectors are made from a stronger material compared to the original injectors. They are stronger and more resistant to cracking, which is a big issue with the standard injectors. They are also optimized in size to ensure a proper fit for both vehicle models. Additionally, they are fitted with hardened chrome-plated ball seats that protect against internal corrosion.

The body is also polished for a compact look. It is so sleek that most people mistake it for steel. The injector’s overall design reflects its durability.

The greatest aspect of the Bosch LB7 injectors is their efficacy. As mentioned, the original versions were prone to cracking and leaking. They did not provide enough oil for the engine, which limited the vehicles’ power. It also posed serious accident risks owing to the engine’s faulty performance. However, these new injectors do not crack or leak. They transmit oil in direct streams to ensure that the engine works optimally.

The Bosch LB7 injectors are easy to install as they come fitted with O-rings and copper crush washers. The package includes eight injectors, so you can change all faulty injectors and spare some. Experts recommend replacing the return line seals and lower valve cover gaskets to improve the overall injection system.

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Highlighted Features:

  • Strong polished body
  • Pre-installed O-rings
  • Pre-installed crush washers
  • Hardened chrome-plated ball seats


2. 6.6L Injectors for LB7 Duramax

6.6L Injectors for LB7 DuramaxAs mentioned, some of the components that power the 2001-2004 GMC and Chevrolet models are manufactured by Duramax. Duramax also goes a step further by remanufacturing the faulty original injectors. You can buy new replacements or send your car’s original cores to Duramax to have them remanufactured.

Duramax corrects all the flaws associated with the original injectors. For starters, the remanufactured injector is stronger than the original. It is reinforced to protect against cracking and corrosion. As such, it does not leak or give way to external contaminants. Additionally, it guarantees the uninterrupted transmission of oil to the engine for optimal performance.

The remanufactured injector also comes with pre-installed O-rings that make it easy to install. The O-rings come in varying colors and are backed by a one-year limited warranty. And, since this injector features the original design, it is compatible with all other components of the injection system. As such, you do not have to buy extra replacement parts.

The Duramax remanufactured injector is cheaper than most other replacement models. What’s more, you stand to get a refund if you send the original core for remanufacturing. If your core meets all the requirements, it will earn you a refund of $50 if returned within 30 days of shipping and $37.50 if returned within two months.

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Highlighted Features:

  • Original body and design
  • Reinforced build
  • Pre-installed colored O-rings
  • Refunds for original cores
  • One-year limited warranty for O-rings

How to Install Duramax 6.6L LB7 Injector:


3. Dieselogic Duramax 6.6L LB7 Injector

Dieselogic Duramax 6.6L LB7 InjectorThis replacement injector is remanufactured by Dieselogic, which is one of the leading manufacturers of diesel engine injection systems. It essentially is an improved version of the original injector. Dieselogic simply improves on the original design and irons out all the reported kinks to make this one of the best injectors for lb7 Duramax.

Dieselogic has reinforced this kit’s body. It is stronger and less susceptible to cracking, unlike the original version. It is also more efficient as it doesn’t leak or give way to other contaminants. The oil is directly injected into the engine on demand, thus ensuring the engine’s optimal performance and preventing leaks from any associated risks.

This kit also comes with pre-installed O-rings, which are compatible with components of the original diesel injection system. Coupled with the fact that the body is original in all dimensions, this injector is wholly compatible with the entire injection system.

The fact that this injector is remanufactured means that it comes at a fraction of the price of new replacement injectors. Additionally, you stand to earn refunds on original cores if you post your original injectors for remanufacturing. The amount refunded depends on the core’s condition and shipping durations. If you return your core within 30 days of shipping, you qualify for a refund of $50. Cores returned within one to two months of shipping earn a $37.50 refund.

Highlighted Features:

  • Reinforced construction
  • Original design
  • Colored O-rings
  • One-year O-ring warranty

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4. Reman Auto Electronics Duramax Fuel Injector

Reman Auto Electronics Duramax Fuel InjectorThis is yet another remanufactured fuel injector for the 2001-2004 GMC and Chevrolet models. This one if remanufactured by Reman Auto Electronics, which is also a notable brand in the vehicle engine spare parts industry.

The manufacturer retains the injector’s original body as well as most of its original components. Its size and design do not change. This ensures that the injector is fully compatible with the standard injection system.

While the body and design remain the same, the manufacturer replaces the O-rings and nozzles with new ones. The new O-rings are designed to make the injector easy to install. The nozzles, on the other hand, are hardy and designed to ensure that the oil doesn’t drip. It is also important to note that the body is reinforced to prevent cracking and other common shortcomings associated with the original version.

Reman Auto Electronics is very stern about the quality of its products. To this end, each injector is thoroughly tested on a state-of-the-art test bench. There are tests for solenoid performance, back leak flow, response time, mid load, full load, idle, injection, and emission. Each injector meets all OE specifications.

You have the option of returning your injector’s core when ordering a replacement injector. If your core is flawless, the manufacturer will hand you a $150 refund.

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Highlighted Features:

  • Original design
  • Stronger nozzles and O-rings
  • Reinforced body
  • OE-tested


5. Duramax LB7 Injector Install Kit

Duramax LB7 Injector Install KitIf you are handy, you can replace your car’s injectors and save yourself some money on the cost of labor. You can make this possible using one of the best Injectors for LB7 Duramax install kits.

This installation kit comes with everything you would need to install up to four injectors into your car. You are also at liberty to order two orders of this kit if you wish to replace all of your car’s injectors. It includes seals for the return line, heater pipe, silicon, and upper radiator pipe. It also comes with cups for storing the O-rings and sealants.

Every component of this installation kit is optimized for ease of use. The kit is easy to work with – you can securely install new injectors with the most basic skills. Additionally, each component is highly durable, so you will not need to perform any more DIY replacements any time soon. Finally, all components are compatible with the vehicle’s injection system.

Highlighted Features:

  • Lower valve cover gaskets
  • Sealant injector cup
  • O-rings injector cup
  • Return line seal
  • Silicone sealer
  • Injector copper and O-rings
  • Upper radiator pipe seal
  • Heater pipe seal
  • FICM seals


How to Install and Remove LB7 Fuel Injectors


Buying Guide for Best Injectors for LB7 Duramax

Best LB 7 Injectors Buying Guide

Are you having trouble with your car’s fuel injectors? Perhaps it is time to have them replaced. While at it, you should look for fuel injectors that are superior in quality compared to the industry’s standards. But what characterizes a high-quality fuel injector? Here are some factors to consider when you go shopping for the best injectors for lb7 Duramax:

  • Type and Compatibility

Your choice of a fuel injector will be determined by your car’s overall fuel injection system. These systems vary in different cars, so not all fuel injectors are compatible.

There are three common types of fuel injection systems. Throttle Body Injection (TBI) systems are the earliest. They work with one or two fuel injectors. Multi-point fuel injection (MPFI) systems are also common and work with one injector in each intake port on the engine’s manifold. Sequential fuel injection (SFI) systems are also common. They look and work eerily similar to the MPFI systems, but they are more efficient as they utilize advanced control systems.

In addition to your car’s fuel injection system, compatibility is also determined by the Original Equipment Manufacturer (OEM) part number. You can check this yourself. Alternatively, you can specify your vehicle’s VIN when purchasing the injector for the dealer to crosscheck. You may be required to replace other components of your vehicle’s fuel injection system if the injector you buy is not compatible.

  • Durability

As clearly illustrated by the original fuel injectors in the 2001-2004 GMC and Chevy models, durability is of paramount importance. Some fuel injectors are prone to cracking and rusting, which gives rise to other complications such as breaking and leaking. Such complications are not only inconveniencing but also potentially risky as they compromise the engine’s performance and increase the risk of an accident occurring as a result.

A fuel injector’s durability is determined by its overall design. Get one that is made of durable materials such as stainless steel and other strong metal alloys. The material should not rust, crack, or break. Additionally, the injector should have passed all OE tests.

  • Efficiency

Fuel injectors are designed to inject fuel into the engine on a per-need basis. The fuel should be injected in a timely manner to make the engine optimally efficient. However, issues such as rusting and cracking often limit the injector’s efficiency, and consequently inhibit the engine’s performance. As such, ensure that the injector you buy is flawless. It is recommended to buy a fuel injector from your vehicle’s original manufacturer.

  • Maintenance

Fuel injectors need cleaning every once in a while. Maintenance takes up time, effort, and money. It would be convenient if your fuel injector did not need too much maintenance. Again, this depends on the injector’s quality. If it doesn’t crack, break, or rust easily, it doesn’t need lots of maintenance.


How to Choose Fuel Injector Kit (Video Review)


Final Word

The aforementioned are the best LB7 injectors for the 2001-2004 GMC and Chevrolet models. They are durable, efficient, and compatible. You should also consider getting the injector install kit if you are handy. It is easy to use, and it will save you lots of money on mechanic bills.


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