How does my vehicle’s AC system work?

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.

What are the signs the system needs service?

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.

Is the puddle of water under my car a sign of AC problems?

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.

Does low refrigerant mean there’s a leak in the system?

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.

Can a new cabin air filter improve AC performance?

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.

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ACDelco GM Genuine Parts 15-11057 Engine Coolant Thermostat Water Inlet Assembly

Product ID: 344429075

Details

Brand
GM GENUINE
Item weight
299 g
Material
Alloy Steel
Vehicle service type
Basic
Weight class
Lightweight

🔥Prevents engine overheating reliably

🔧GM OE spec for perfect fit & function

⚙️Steel thermostat material for durability

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VT18803

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Keep your engine cool, your ride smooth, and your status premium!

TRUSTED GM QUALITY - Backed by General Motors for guaranteed reliability and longevity
OVERHEAT PROTECTION - Effectively repairs leaks and prevents costly engine overheating
SEAMLESS COMPATIBILITY - Perfect OEM replacement for your GM vehicle’s original thermostat housing
PRECISION ENGINE COOLING - Engineered to GM OE specs for flawless fit and optimal temperature control
DURABLE STEEL CONSTRUCTION - Built with high-grade steel to withstand extreme engine conditions

The ACDelco GM Genuine Parts 15-11057 Engine Coolant Thermostat Water Inlet Assembly is a GM-recommended, steel-built thermostat housing designed to prevent engine overheating by ensuring precise coolant flow. Manufactured to exact GM OE specifications, it guarantees a perfect fit and long-lasting durability for GM vehicles, making it the trusted choice for professional-grade engine maintenance.

Specifications

ASIN	B002VVC4TG
Best Sellers Rank	#9,698 in Automotive ( See Top 100 in Automotive ) #5 in Car Engine Thermostats
Brand	GM GENUINE PARTS
Customer Reviews	4.7 4.7 out of 5 stars (1,065)
Date First Available	7 August 2012
Exterior	Machined
Item Weight	299 g
Item model number	15-11057
Manufacturer	AC Delco
Manufacturer Part Number	12600172
Model	Water Inlet Assembly
OEM Part Number	12600172
Product Dimensions	15.75 x 10.41 x 10.41 cm; 299.37 g

Reviews

S**L

Perfect fit to new ACDelco water water pump.

25.01.2025

A**R

I put the thermostat and housing in my 2004 Chevy Avalanche Z71 2 years ago and they are a perfect fit for the engine...Still going strong

24.04.2024

G**O

Excelente

24.11.2019

J**N

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

13.05.2025

D**N

Item arrived as described and was the right part. Easy to install. Works great.

17.11.2021

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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VT18803

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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3 weeks ago

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