Bosch LB7 Duramax Injector
Brand NEW or Remanufactured
- with one year unlimited mileage warranty -
fits
2001 - 2004 Chevy / GMC Duramax Diesel with LB7 Engine
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Option 1
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$205 plus Core
Premium Remanufactured Bosch LB7 Injector
- Original Equipment LB7 Bosch reman injectors that have been independently remanufactured to the highest standards
- New control valve assembly with hard chrome ball seat and new nozzle tip on every injector
- Not just repaired - Remanufactured using the latest techniques and upgrades
- Every single LB7 stock injector is built to meet or exceed manufacturer's specifications
- Each injector is individually tested on state of the art test benches and data recorded to ensure a quality traceable product.
- Thousands of these Bosch LB7 injectors have been installed worldwide in both end-user and fleet / commercial applications.
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Option 2:
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$269.95 plus Core
OEM NEW Bosch LB7 Injector
- These are genuine, new Bosch LB7 injectors - even the injector body is NEW and made from an update material to prevent the previously common cracking issues which often resulted in fuel contamination of the oil
- These new Duramax LB7 injectors include all the most recent updates from Bosch including hard chrome ball seat and DLC coated nozzle needle for longer service life
- Beautiful high-polish appearance (sometimes mistakenly referred to as stainless steel)
-Without question the best stock injector available for the LB7 application. - For the minor cost increase we feel these injectors are well worth the additional cost considering the high labor involved in replacing injectors on the LB7 application.
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If your Duramax emits excessive white smoke while idling it most likely needs new injectors. This is a common failure and is most often caused by wear in the injector nozzle resulting in incomplete sealing. Duramax LB7 injectors are also known to develop external leaks. Because of their location inside the engine this can result in dilution of the crankcase lubrication oil with diesel fuel. However cracked return fuel rails, improperly tightened return banjo connections, and in rare cases, a bad CP3 pump, can also cause the same symptom.
We also offer lower valve cover gasket kits, glow plugs, injector installation kits, banjo bolts, and more - see related items below.
We have heard many reports from a number of customers that injectors purchased from the dealership network were not OEM Bosch as has traditionally been the case, but rather a reman product of lower than expected quality. Use caution in selecting your reman Bosch LB7 injector source.
(Please note that later 2004 Duramax engines use the LLY engine and a different injector. To identify your engine, check the eight digit of the VIN - if you have an LB7 engine, it will be a '1')
Part Numbers:
97729095
0 445 120 008
0 986 435 502
- We also offer LB7 Performance injectors - Torquemaster, 50HP and larger - see related times below. -
LB7 Duramax injector sets will ship to exact match credit card billing address only, Non-compliant orders will be cancelled.
Bosch LB7 Duramax Injector Installation Steps and Required Tools
Replacing the vacuum pump on a GM 6.5L diesel is straightforward for experienced owners and independent mechanics, but the right tools and sequence ensure a clean install. Gather basic hand tools, a pulley puller, a torque wrench, and a vacuum gauge for post‑installation verification. Disconnect the negative battery cable, then remove the serpentine belt to access the pump. Unbolt the mounting bracket, inspect the vacuum lines for cracks, and confirm the check valve is functioning. When installing the new unit, torque bolts evenly to avoid housing distortion, and verify vacuum output at idle. This step is especially important for trucks with extensive diesel parts and accessories, or for owners maintaining engines equipped with components such as a Bosch LB7 Duramax injector, where a consistent vacuum supply helps ensure proper system behavior across HVAC and brake‑assist functions.
For reliable replacement components backed by expert diesel knowledge, Accurate Technical Services LLC supplies high‑quality vacuum pumps and supporting tools for GM 6.5L platforms. Order today for trusted guidance and fast shipping.
FAQ
- What symptoms indicate vacuum pump failure beyond HVAC issues?
Intermittent brake‑assist loss, hissing noises near the pump and slow‑responding HVAC controls often point to declining vacuum output.
- Should vacuum lines be replaced during pump installation?
Yes. Brittle or oil‑soaked lines can leak vacuum and cause repeat failures, making line replacement a smart preventative step.
- How can I verify proper vacuum after installation?
Use a handheld gauge to confirm stable vacuum at idle and during light throttle. Fluctuation may indicate a hose leak or faulty check valve.
- Does a failing vacuum pump affect brake‑booster performance?
Absolutely. Reduced vacuum directly impacts brake‑assist strength, especially during low‑RPM driving or towing.
- What other components should be inspected when replacing the pump?
Check the belt tensioner, vacuum reservoir, check valve and HVAC actuators to ensure the entire system operates correctly.