# Fleece Performance GM Automatic Transmission 20-Pin Pigtail

Our replacement GM Automatic Transmission 20-Pin pigtail features 12" leads that are labeled with the pin positions to aid in installation. Includes 20 heat-sealable butt-style connectors. 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 12126459 and AC Delco PT729 Application Notes: Fits: Allison 1000/2000, 4L60E, 4L65E, 4L70E, 4L80E, 4L85E, 4T45E, 4T65E, 4T80E

This Part Fits:

Year

Make

Model

Submodel

2001-2005

Chevrolet

Silverado 2500 HD

Base

2015-2016

Chevrolet

Silverado 2500 HD

High Country

2001-2006

Chevrolet

Silverado 2500 HD

LS

2001-2016

Chevrolet

Silverado 2500 HD

LT

2007-2016

Chevrolet

Silverado 2500 HD

LTZ

2004-2016

Chevrolet

Silverado 2500 HD

WT

2007

Chevrolet

Silverado 2500 HD Classic

LS

2007

Chevrolet

Silverado 2500 HD Classic

LT

2007

Chevrolet

Silverado 2500 HD Classic

WT

2001-2005

Chevrolet

Silverado 3500

Base

2001-2006

Chevrolet

Silverado 3500

LS

2001-2006

Chevrolet

Silverado 3500

LT

2004,2006

Chevrolet

Silverado 3500

WT

2002-2005,2015-2016

GMC

Sierra 2500 HD

Base

2011-2016

GMC

Sierra 2500 HD

Denali

2001-2002,2006

GMC

Sierra 2500 HD

SL

2001-2016

GMC

Sierra 2500 HD

SLE

2001-2016

GMC

Sierra 2500 HD

SLT

2003-2014

GMC

Sierra 2500 HD

WT

2007

GMC

Sierra 2500 HD Classic

SL

2007

GMC

Sierra 2500 HD Classic

SLE

2007

GMC

Sierra 2500 HD Classic

SLT

2007

GMC

Sierra 2500 HD Classic

WT

2002-2005

GMC

Sierra 3500

Base

2001-2002,2006

GMC

Sierra 3500

SL

2001-2006

GMC

Sierra 3500

SLE

2001-2006

GMC

Sierra 3500

SLT

2004-2006

GMC

Sierra 3500

WT

2007

GMC

Sierra 3500 Classic

SL

2007

GMC

Sierra 3500 Classic

SLE

2007

GMC

Sierra 3500 Classic

SLT

2007

GMC

Sierra 3500 Classic

WT

2015-2016

GMC

Sierra 3500 HD

Base

2011-2016

GMC

Sierra 3500 HD

Denali

2007-2016

GMC

Sierra 3500 HD

SLE

2007-2016

GMC

Sierra 3500 HD

SLT

2007-2014

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 160.71 CAD
- **Vendor:** Fleece Performance
- **Type:** Wiring Harnesses

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 160.71 CAD | In stock |

## Images

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

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/fleece-performance-gm-automatic-transmission-20-pin-pigtail)
> Updated: 2026-06-27