Fuel Injector Connector Pigtail Kit L5P/LML/LM2/LZ0 Duramax – 8 Pack

A common failure point on the L5P Duramax platform is the fuel injector connector and short pigtail section of harness. Over time, heat, vibration, and moisture can increase resistance in the circuit and cause intermittent misfires or injector circuit codes (P0201–P0208) on LML, L5P, and 3.0L Duramax engines.

This 8‑pack grey‑wire injector connector kit is built as a direct‑fit repair solution for shops and DIY owners who want an OE‑style fix without buying an entire engine harness. Each connector includes an approximately 6 inch, 16 gauge automotive‑grade pigtail that trims easily to length while maintaining proper flexibility and strain relief at the injector. The neutral grey wire color looks factory in the engine bay, avoids the confusion of red/black “power/ground” colors, and gives your repairs a consistent, professional appearance.

Every kit includes heat‑sealable butt‑style connectors so you can make a sealed, weather‑resistant repair that stands up to diesel engine bay conditions. Replace all eight injector connectors at once to eliminate intermittent connection issues and avoid repeat comebacks for random misfire or circuit faults. This connector is typically serviced any time an injector is replaced on L5P and LML trucks and is a smart add‑on for any fuel system or injector job.

Features

• 8 grey‑wire fuel injector connector pigtails, one for each cylinder.​

• 16 AWG automotive‑grade wire, sized for injector circuit loads and flexibility.

• 6 inch leads for easy trimming and routing.

• Includes heat‑sealable butt connectors for sealed repairs.

• Compatible with GM 19368140 injector connector applications.

• Ideal for injector replacement, harness repairs, and preventative maintenance on high‑mileage trucks.

Diagnostic tips

• Inspect each injector connector for broken locks, chafed insulation, and discolored terminals indicating high resistance.

• If you are chasing P0201–P0208 injector circuit codes or a random P0300 misfire, lightly wiggle the injector harness at each connector while monitoring misfire counts or scan data.

• Many L5P/LML trucks set injector circuit faults due to poor pin fit or damaged connectors, not failed injectors, so always validate the connector before condemning the injector.

• Use quality heat‑shrink butt splices or solder with adhesive‑lined heat shrink, then secure the repair with tape or loom to prevent movement and future abrasion.

Common DTC codes

• P0201 – Cylinder 1 Injector Circuit Fault

• P0202 – Cylinder 2 Injector Circuit Fault

• P0203 – Cylinder 3 Injector Circuit Fault

• P0204 – Cylinder 4 Injector Circuit Fault

• P0205 – Cylinder 5 Injector Circuit Fault

• P0206 – Cylinder 6 Injector Circuit Fault

• P0207 – Cylinder 7 Injector Circuit Fault

• P0208 – Cylinder 8 Injector Circuit Fault

• P0300 – Engine Random Misfire Detected

Fitment / application notes

• Fits 2017–2024 L5P 6.6L Duramax fuel injectors

• Fits 2011–2016 LML 6.6L Duramax fuel injectors​

• Fits 2019–2025 LM2 and LZ0 3.0L Duramax fuel injectors​

• Direct replacement for GM injector connector pigtail 19368140 (connector body/cavity layout matches OE)