# Fleece Performance 11-16 GM 2500-3500 Duramax Fuel Rail Pressure Harness

Our Fuel Rail Pressure harness for the 2011-2016 6.6L Duramax is a direct replacement for GM Part Numbers 12647115 and 12638158. 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. Replaces discontinued GM part number: 12647115 and 12638158 APPLICATION NOTES 2011-2016 6.6L Duramax Fuel Rail Pressure Harness - This harness routes underneath the turbocharger and connects to the main chassis harness.

This Part Fits:

Year

Make

Model

Submodel

2015-2016

Chevrolet

Silverado 2500 HD

High Country

2011-2016

Chevrolet

Silverado 2500 HD

LT

2011-2016

Chevrolet

Silverado 2500 HD

LTZ

2011-2016

Chevrolet

Silverado 2500 HD

WT

2015-2016

Chevrolet

Silverado 3500 HD

High Country

2011-2016

Chevrolet

Silverado 3500 HD

LT

2011-2016

Chevrolet

Silverado 3500 HD

LTZ

2011-2016

Chevrolet

Silverado 3500 HD

WT

2015-2016

GMC

Sierra 2500 HD

Base

2011-2016

GMC

Sierra 2500 HD

Denali

2011-2016

GMC

Sierra 2500 HD

SLE

2011-2016

GMC

Sierra 2500 HD

SLT

2011-2014

GMC

Sierra 2500 HD

WT

2015-2016

GMC

Sierra 3500 HD

Base

2011-2016

GMC

Sierra 3500 HD

Denali

2011-2016

GMC

Sierra 3500 HD

SLE

2011-2016

GMC

Sierra 3500 HD

SLT

2011-2014

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 119.31 CAD
- **Vendor:** Fleece Performance
- **Type:** Wiring Harnesses

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 119.31 CAD | In stock |

## Images

- Photo - Primary
- User 2
- User 1
- User 9
- User 1
- User 3
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/fleece-performance-11-16-gm-2500-3500-duramax-fuel-rail-pressure-harness)
> Updated: 2026-06-27