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NLT1Q01036
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8-Piece High-Pressure Injector Line Set for 2001–2004 GM 6.6L LB7 Duramax
$92.99
In Stock
$92.99
Sale price
$92.99
Regular price
New aftermarket eight-piece high-pressure fuel-injector line set for compatible 2001–2004 Chevrolet and GMC trucks with the 6.6L LB7 Duramax diesel.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 2001 Chevrolet Silverado/GMC Sierra 2500HD 6.6L LB7
- 2002–2004 Chevrolet Silverado/GMC Sierra 2500HD 6.6L LB7
- 2001–2004 Chevrolet Silverado/GMC Sierra 3500 6.6L LB7
- 2001–2004 Chevrolet/GMC medium-duty applications with matching LB7 line routing
Product Overview
Rust and debris inside old injector lines can contaminate new injectors, while damaged flare seats may cause dangerous high-pressure leaks. This complete set renews all eight hard lines during injector service or a confirmed line failure.
LB7 lines must be kept surgically clean. Match the engine code and line routing, and never loosen or inspect a running common-rail system by hand.
Key Features & Performance
- Eight cylinder-specific high-pressure injector lines
- Covers both cylinder banks on the LB7 engine
- Helps prevent old-line debris from reaching replacement injectors
- Preformed routing for matching 2001–2004 applications
Replaces Part Numbers
- 97188720
- 97188721
- 97188722
- 97188723
Common Uses
- Replacing contaminated lines during injector replacement
- Repairing a leaking flare or damaged hard line
- Renewing corroded lines before they compromise new fuel-system parts
Technical Specifications
- Product Type: High-pressure injector line set
- Quantity: 8 lines
- Engine: 6.6L LB7 Duramax
- Model Years: 2001–2004
- Condition: New
- Replacement Type: Aftermarket
Installation & Fitment
- Depressurize the system and follow common-rail safety procedures
- Cap every open fitting immediately and keep dirt out
- Install each line in its cylinder-specific position without bending
- Torque fittings to specification and inspect for leaks with approved methods
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
This set is for LB7 routing and fittings. Engine code, production date, injector configuration, and previous fuel-system modifications must be checked before purchase.
Frequently Asked Questions
Q: Why replace injector lines when installing injectors? A: Corrosion or debris trapped inside old lines can damage or contaminate replacement injectors.
Q: Are all eight lines included? A: Yes. The set covers all eight cylinders.
Q: Does it fit an LLY Duramax? A: No. This listing is for the 2001–2004 LB7 configuration.
Q: Can I check for leaks with my fingers? A: No. High-pressure diesel fuel can penetrate skin; use the approved inspection procedure.
Part Summary
keywords: LB7 injector line set, 2001 2004 Duramax fuel lines, 97188720 replacement, Chevy 6.6 high pressure lines, LB7 injector contamination repair
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.