# Fleece Performance 17-19 GM 2500/3500 Duramax LP5 Fan Extension Harness

Our replacement fan extension harness for the 2017-2019 L5P Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan assembly. This harness is mounted to the fan assembly and connects to the fan and chassis harness. Produced in-house, our manufacturing process includes fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need to get your truck back on the road quickly. Application Notes: Fits cooling fan clutch part numbers: 15-40577 and 84013368

This Part Fits:

Year

Make

Model

Submodel

2017-2019

Chevrolet

Silverado 2500 HD

High Country

2017-2019

Chevrolet

Silverado 2500 HD

LT

2017-2019

Chevrolet

Silverado 2500 HD

LTZ

2017-2019

Chevrolet

Silverado 2500 HD

WT

2017-2019

Chevrolet

Silverado 3500 HD

High Country

2017-2019

Chevrolet

Silverado 3500 HD

LT

2017-2019

Chevrolet

Silverado 3500 HD

LTZ

2017-2019

Chevrolet

Silverado 3500 HD

WT

2017-2019

GMC

Sierra 2500 HD

Base

2017-2019

GMC

Sierra 2500 HD

Denali

2017-2019

GMC

Sierra 2500 HD

SLE

2017-2019

GMC

Sierra 2500 HD

SLT

2017-2019

GMC

Sierra 3500 HD

Base

2017-2019

GMC

Sierra 3500 HD

Denali

2017-2019

GMC

Sierra 3500 HD

SLE

2017-2019

GMC

Sierra 3500 HD

SLT

## Details

- **Price:** 86.18 CAD
- **Vendor:** Fleece Performance
- **Type:** Wiring Harnesses

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 86.18 CAD | In stock |

## Images

- Photo - Primary
- User 3
- User 1
- User 2
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- User 1
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/fleece-performance-17-19-gm-2500-3500-duramax-lp5-fan-extension-harness)
> Updated: 2026-06-27