---
product_id: 22634747
title: "GM Genuine Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line"
brand: "gm genuine parts"
price: "€ 677.94"
currency: EUR
in_stock: true
reviews_count: 11
category: "Gm Genuine Parts"
url: https://www.desertcart.gr/products/22634747-gm-genuine-parts-25999420-automatic-transmission-fluid-cooler-inlet-outlet
store_origin: GR
region: Greece
---

# Durable Heat-Resistant Design Perfect OEM Replacement GM OE Spec Fit & Function GM Genuine Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line

**Brand:** gm genuine parts
**Price:** € 677.94
**Availability:** ✅ In Stock

## Summary

> ⚙️ Keep your GM running cool with genuine precision and power!

## Quick Answers

- **What is this?** GM Genuine Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line by gm genuine parts
- **How much does it cost?** € 677.94 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/22634747-gm-genuine-parts-25999420-automatic-transmission-fluid-cooler-inlet-outlet)

## Best For

- gm genuine parts enthusiasts

## Why This Product

- Trusted gm genuine parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy OEM Upgrade:** Direct replacement part that maintains your vehicle’s factory integrity.
- • **Unmatched Durability:** Built to withstand high heat and pressure for long-lasting performance.
- • **Trusted by Professionals:** Backed by General Motors for reliability you can count on.
- • **Precision GM OE Engineering:** Guaranteed exact fit, form, and function for your GM vehicle.
- • **Seamless Transmission Cooling:** Optimizes fluid flow to keep your transmission running cooler and smoother.

## Overview

The GM Genuine Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line is a factory-spec replacement designed and tested by General Motors. Engineered for perfect fit and durability, it ensures optimal transmission cooling performance, maintaining your vehicle’s reliability and longevity with trusted OE quality.

## Description

GM Genuine Parts Automatic Transmission Oil Cooler Hose Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Review: 2008 Cadillac Escalade ESV all wheel drive 6.2L - Arrived quickly. Fit perfect. This was by no means easy to install, at no fault to the seller. I jacked up the passenger side, only because I needed to install a wheel speed sensor. Had to pull the front clip off, plastic only. I removed the electric radiator fans to facilitate installation, personal choice. There is a black plastic piece that runs and bolts in across the grill and bolts in under headlights, I removed the screw bolts in order to maneuver the line attaching to the AT cooler better. Removed some fender liner screw bolts and 2 brace screw bolts. All wheel drive front axle made it even more fun, I would have dropped the axle but my jack started leaking fluid. Anyway 6-8 hrs taking breaks and fighting rusted screw bolts. Probably could do it in 4 now that I've done it once.. GL
Review: Good quality - Works well I ordered it. Let it sit around for a year finally blew out changed. It works well no leaks, but in about a year.

## Features

- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function
- Product Type: AUTO_PART

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B003YOD39E |
| Best Sellers Rank | #105,760 in Automotive ( See Top 100 in Automotive ) #29 in Automotive Replacement Transmission Cooling Lines |
| Brand | GM GENUINE PARTS |
| Customer Reviews | 4.5 4.5 out of 5 stars (197) |
| Date First Available | August 7, 2010 |
| Exterior | Machined |
| Item Weight | 1.92 pounds |
| Item model number | 25999420 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 25999420 |
| Model | ACDelco - Automatic Trans (Slp) (25999420) |
| OEM Part Number | 25999420 |
| Product Dimensions | 49 x 31.5 x 6.1 inches |

## Product Details

- **Brand:** GM GENUINE PARTS
- **Global Trade Identification Number:** 00021625774961
- **Item Weight:** 1.9 Pounds
- **Manufacturer:** ACDelco
- **Nominal Wall Thickness:** 0.03 inches
- **UPC:** 021625774961

## Images

![GM Genuine Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line - Image 1](https://m.media-amazon.com/images/I/414SdOwQbJL.jpg)

## Questions & Answers

**Q: Does this fit a 2009 Tahoe ls**
A: if it has the 6 speed transmission and trailer tow package with aux. trans cooler

**Q: Does this fit 1985 C10**
A: I tried to verify at rockauto dot com but didn’t have enough info to get specifics. Engine type, etc. Visit there and then you should be able to verify or find the one you need.

**Q: Does this fit a 2012 chevy**
A: Google the year make and model of the vehicle and type in the part number .and this will show you if the part will fit the vehicle.

**Q: Does it fit 1995 4.0l 6cyl 4x4 jeep grand cherokee laredo**
A: If your 1995 4.0l 6cyl 4x4 jeep grand Cherokee Laredo has a 6speed auto from a GM with the aux trans cooler then yes it will fit, otherwise it don't believe it will work for your application

## Customer Reviews

### ⭐⭐⭐⭐⭐ 2008 Cadillac Escalade ESV all wheel drive 6.2L
*by J***S on March 31, 2021*

Arrived quickly. Fit perfect. This was by no means easy to install, at no fault to the seller. I jacked up the passenger side, only because I needed to install a wheel speed sensor. Had to pull the front clip off, plastic only. I removed the electric radiator fans to facilitate installation, personal choice. There is a black plastic piece that runs and bolts in across the grill and bolts in under headlights, I removed the screw bolts in order to maneuver the line attaching to the AT cooler better. Removed some fender liner screw bolts and 2 brace screw bolts. All wheel drive front axle made it even more fun, I would have dropped the axle but my jack started leaking fluid. Anyway 6-8 hrs taking breaks and fighting rusted screw bolts. Probably could do it in 4 now that I've done it once.. GL

### ⭐⭐⭐⭐⭐ Good quality
*by R***T on July 11, 2025*

Works well I ordered it. Let it sit around for a year finally blew out changed. It works well no leaks, but in about a year.

### ⭐⭐⭐⭐⭐ Perfect fit on my '07 Escalade EXT.
*by N***D on July 10, 2017*

Exact OEM replacement for my '07 Escalade EXT. It is a pretty easy swap other than needing to remove the front bumper/grill as a whole assembly to access the fitting to the transmission cooler. I HIGHLY recommend also replacing the other line at the same time, PN 15779543. The other line is cheap and a simple swap if you are already replacing this line. Though you can release the pins with a pick, I'd recommend getting the proper disconnect tool. If you do any towing, I'd also recommend swapping to a larger transmission cooler at the same time, as the factory one is inadequate for any heavy loads. There is an adapter kit for the Tru-Cool 40,000 GVW cooler that allows you to use the OEM lines/connections for a factory-like install.

## Frequently Bought Together

- GM Parts 25999420 Automatic Transmission Fluid Cooler Inlet and Outlet Line
- GM Genuine Parts 15779543 Automatic Transmission Auxiliary Fluid Cooler Inlet Line
- GM Genuine Parts 84828848 Engine Oil Cooler Hose Kit with Bracket, Gasket and Bolt, Black

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-02-25*