Fleece Performance FPE-HAR-L5P-INJ-PT-4P is a 4-pack of replacement fuel injector connector pigtails for 2011-2016 Chevy/GMC 6.6L LML Duramax, 2017-2024 6.6L L5P Duramax and 2020-2025 3.0L Duramax trucks. Heat, vibration and age crack the factory injector connectors and chafe the wiring behind them. The result is intermittent injector circuit faults, misfires and dead cylinder codes.

Each pigtail carries a new connector on 4.5" leads with heat-sealable butt-style connectors, so you splice in a fresh connection without replacing the whole harness. The 4-pack covers half of a V8 or a complete set of related repairs. No core required.

Key Features & Benefits

• New Connector Housing: replaces a cracked or loose factory injector connector.
• 4.5" Leads: enough wire to cut back past damaged insulation and make a clean splice.
• Heat-Sealable Butt Connectors: crimp and shrink for a sealed, vibration-resistant joint.
• 4-Pack: four pigtails in one part number for multi-cylinder repairs.

Technical Specifications

• Manufacturer / Brand: Fleece Performance
• Part Number / SKU: FPE-HAR-L5P-INJ-PT-4P
• Product Type: Fuel Injector Connector Pigtail, 4-Pack
• Lead Length: 4.5"
• Splice Type: Heat-sealable butt connectors (included)
• Truck Compatibility: 2011-2024 Chevrolet Silverado / GMC Sierra 2500HD/3500HD; 2020-2025 Chevrolet/GMC 3.0L Duramax applications
• Engine Platform: 6.6L LML Duramax; 6.6L L5P Duramax; 3.0L LM2 / LZ0 Duramax
• Core Requirement: No core required

Vehicle Fitment & Technical Installation Notes

Fits 2011-2016 6.6L LML Duramax, 2017-2024 6.6L L5P Duramax and 2020-2025 3.0L Duramax trucks.

Installation Tip: Disconnect both batteries, then cut and splice one wire at a time so polarity stays correct. Stagger the splices, shrink each connector fully and secure the harness away from heat and sharp edges before clearing codes.