---
product_id: 1280124
title: "15-11057 (12600172) Engine Coolant Thermostat Water Inlet Assembly"
brand: "gm genuine parts"
price: "$104.20"
currency: USD
in_stock: true
reviews_count: 13
category: "Gm Genuine Parts"
url: https://www.desertcart.us/products/1280124-15-11057-12600172-engine-coolant-thermostat-water-inlet-assembly
store_origin: US
region: United States of America
---

# Prevents engine overheating Direct fit for GM vehicles OE-spec steel thermostat housing 15-11057 (12600172) Engine Coolant Thermostat Water Inlet Assembly

**Brand:** gm genuine parts
**Price:** $104.20
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your GM running cool with genuine precision ⚙️

## Quick Answers

- **What is this?** 15-11057 (12600172) Engine Coolant Thermostat Water Inlet Assembly by gm genuine parts
- **How much does it cost?** $104.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1280124-15-11057-12600172-engine-coolant-thermostat-water-inlet-assembly)

## 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

- • **Precision OE Fit:** Engineered to GM’s exacting standards for seamless installation and performance
- • **Trusted GM Quality:** Genuine GM part guarantees factory-level durability and compatibility
- • **Overheat Protection:** Corrects thermostat failures to keep your engine running cool and safe
- • **Quick & Easy Replacement:** Vehicle-specific design means less downtime and hassle-free repair
- • **Durable Steel Construction:** Built to last with high-quality steel ensuring long-term reliability

## Overview

The GM Genuine Parts 15-11057 Engine Coolant Thermostat Water Inlet Assembly is a factory-recommended replacement part crafted from durable steel and engineered to GM OE specifications. Designed to prevent engine overheating by correcting thermostat failures, it offers a direct fit for GM vehicles, ensuring reliable performance and long-lasting durability backed by General Motors.

## Description

GM Genuine Parts Engine Coolant Thermostate Housing 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: OEM QUALITY - Works as it should. Fits properly. Would be nice if it included the hardware as I had to source those separately.
Review: Perfect Fit - Purchased this for my 2004 Chevy Tahoe and it’s a direct fit. Comes with everything you need to make this job quick and easy. OEM standard quality for a fraction of local parts stores.

## Features

- Repairs leaking thermostat housings
- Corrects engine overheating caused by failed thermostat
- 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; Thermostat Material: Steel

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002VVC4TG |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #24,671 in Automotive ( See Top 100 in Automotive ) #30 in Automotive Replacement Engine Thermostats |
| Brand | GM GENUINE PARTS |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,090) |
| Date First Available | October 27, 2009 |
| Exterior | Machined |
| Global Trade Identification Number | 40707773594795 |
| Item Weight | 10.6 ounces |
| Item model number | 15-11057 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 12600172 |
| Material | Basic |
| Model | Water Inlet Assembly |
| OEM Part Number | 12600172 |
| Product Dimensions | 6.2 x 4.1 x 4.1 inches |
| UPC | 707773594797 |
| Vehicle Service Type | Basic |
| Weight Class | one |

## Product Details

- **Automotive Fit Type:** Vehicle Specific Fit
- **Brand:** GM GENUINE PARTS
- **Global Trade Identification Number:** 40707773594795
- **Item Weight:** 0.66 Pounds
- **Manufacturer:** ACDelco
- **Material:** Basic
- **OEM Part Number:** 12600172
- **UPC:** 707773594797
- **Vehicle Service Type:** Basic
- **Weight Class:** one

## Images

![15-11057 (12600172) Engine Coolant Thermostat Water Inlet Assembly - Image 1](https://m.media-amazon.com/images/I/510xe1BhDgL.jpg)

## Questions & Answers

**Q: How does my vehicle’s AC system work?**
A: The AC compressor pressurizes refrigerant gas, which moves to the condenser. The gas releases heat, condensing into a high-pressure liquid. After cooling, the liquid passes over evaporator coils to cool the air as it is blown through the vents.

**Q: What are the signs the system needs service?**
A: Common indicators of an air conditioning system in need of service include warm and/or weak airflow through the vents, frequent on/off cycling of the system and a strange or musty odor.

**Q: Is the puddle of water under my car a sign of AC problems?**
A: Not necessarily. Condensation typically builds up on the AC evaporator and the water is drained at the bottom of the vehicle. That’s normal, but a larger puddle combined with reduced AC performance could indicate a problem.

**Q: Does low refrigerant mean there’s a leak in the system?**
A: In most cases the answer is yes. AC systems in older cars will experience refrigerant leakage over time, but a later-model vehicle that needs continual refrigerant recharging typically indicates a leak.

**Q: Can a new cabin air filter improve AC performance?**
A: Yes. A very dirty or clogged cabin air filter can reduce the airflow of the AC system, reducing its cooling efficiency and making the system work harder than normal. Periodic cabin filter replacements help the AC system keep its cool.

## Customer Reviews

### ⭐⭐⭐⭐⭐ OEM QUALITY
*by J***N on May 13, 2025*

Works as it should. Fits properly. Would be nice if it included the hardware as I had to source those separately.

### ⭐⭐⭐⭐⭐ Perfect Fit
*by S***O on June 24, 2025*

Purchased this for my 2004 Chevy Tahoe and it’s a direct fit. Comes with everything you need to make this job quick and easy. OEM standard quality for a fraction of local parts stores.

### ⭐⭐⭐⭐⭐ A Good OEM Part.
*by G***D on August 9, 2024*

This is an updated Thermostat housing for older models requiring a water pump replacement. I used this on a 2003 Express with the 6.0L gas engine. People have knocked this for being made in Japan. It's a lot better than Chinese made junk. Works well and the Thermostat has a seal on it. Recommend using a sealant for the housing to water pump.

## Frequently Bought Together

- ACDelco GM Genuine Parts 15-11057 Engine Coolant Thermostat Water Inlet Assembly
- ACDelco Gold 252-845 (19195104) Engine Water Pump
- ACDelco Gold 38158 Drive Belt Tensioner Assembly with Pulley, Aluminum w/ Black Pulley

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-08*