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SKU: FPE-HAR-LM2-INJ-12P-PT | UPC: 732777409648
Fleece Performance 2020-2024 GM 3.0L LM2/LZ0 Duramax Injector Harness Pigtail
The Fleece Performance FPE-HAR-LM2-INJ-12P-PT Injector Harness Pigtail is a high-quality repair and replacement solution for the factory injector wiring harness on 2020-2024 GM vehicles equipped with the 3.0L Duramax LM2/LZ0 inline-6 diesel engine. This pigtail kit addresses common issues such as chafing, corrosion, melted connectors, or broken pins that cause misfires, rough idle, reduced power, or check engine lights related to injector circuits. Pre-wired with OEM-style connectors, weatherproof seals, and high-temperature resistant wire, it provides a plug-and-play repair without splicing factory harnesses. Ideal for high-mileage trucks, tuned applications, or after emissions delete/tuning where harness stress is increased. Designed for professional-grade reliability in heavy-duty diesel performance and repair.
Key Features & Benefits
- OEM-Style Connectors – Direct plug-and-play fit to factory injectors and ECM harness
- High-Temperature Resistant Wire – Withstands underhood heat and vibration for long-term durability
- Weatherproof Seals – Protects against moisture, corrosion, and road contaminants
- Pre-Wired Pigtail – Eliminates need for custom splicing or soldering in most repairs
- Fleece Performance Quality – Engineered for Cummins/Duramax diesel enthusiasts and heavy-duty use
| Specification | Detail |
|---|---|
| Part Number | FPE-HAR-LM2-INJ-12P-PT |
| Brand | Fleece Performance |
| Application | 2020-2024 GM 3.0L Duramax LM2/LZ0 (Silverado 1500, Sierra 1500, etc.) |
| Connector Type | Injector pigtail harness (12-pin configuration) |
| Wire | High-temperature rated with weatherproof seals |
| Installation | Plug-and-play repair – replaces damaged injector harness sections |
| Warranty | Fleece Performance Limited Warranty |
Whats Included
- One 12-pin injector harness pigtail repair kit
- Weatherproof seals and terminals
- Installation instructions
Product Notes
- Fixes common injector harness issues causing misfires, codes, or no-start conditions
- Especially useful after tuning, emissions delete, or high-mileage wear
- Pre-wired for quick repair – soldering or crimping may be required for some installs
- Compatible with stock or aftermarket injectors on LM2/LZ0 3.0L Duramax
- Fleece Performance – leading name in Duramax diesel performance and repair
Installation Notes
- Estimated time: 2-4 hours
- Disconnect battery, locate damaged injector harness
- Remove old connector/pins, install new pigtail with proper crimping/soldering
- Secure harness routing, reconnect, and test for proper injector operation
- Professional installation recommended due to electrical work
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2020-2024 | Chevrolet / GMC | Silverado 1500 / Sierra 1500 | 3.0L Duramax LM2/LZ0 | Injector harness pigtail repair |
Why Choose Fleece Performance Injector Harness Pigtail?
- Restores reliable injector operation and eliminates common electrical faults
- High-quality pre-wired design for faster, cleaner repairs
- Weatherproof construction prevents future corrosion failures
- Fleece Performance – trusted in Duramax diesel performance and repair
Frequently Asked Questions
-
Q: Will this fit my 2022 GMC Sierra 1500 3.0L Duramax?
A: Yes, direct repair for 2020-2024 3.0L LM2/LZ0 Duramax injector harness. -
Q: What tools are needed?
A: Pin removal tool, crimper/soldering iron, heat shrink, and basic hand tools. -
Q: Is tuning affected?
A: No, repairs stock or tuned injector connections; re-tune if codes persist.
Shipping and Handling
- Method: UPS / FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 1-2 lbs
Fleece Performance
Fleece Performance Engineering has grown from a small Indiana operation into one of the most respected names in high-performance diesel upgrades, with a product catalog built specifically around the Duramax and Cummins common rail diesel platforms that dominate the high-horsepower diesel community. Founded by brothers Brayden and Chase Fleece in a rural west-central Indiana pole barn, the company established itself as a technology leader in common rail injection systems within five years, developing the Cheetah turbocharger line and the TurboBrake electronic exhaust brake that have become standard references for what diesel performance engineering can achieve. Fleece operates from an 18,750-square-foot Brownsburg, Indiana facility capable of in-house design, manufacturing, assembly, and testing, placing them among the high-output diesel specialists who supply race teams and serious street performance builds. This collection covers Fleece Performance's full range of Duramax and Cummi...
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