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 15-51369 GM Original Equipment Air Conditioning Expansion Valve Kit with Evaporator Seals, Valve, Stud, and Bolts

Product ID: 346129461

Details

Brand
GM GENUINE
Exterior finish
Aluminium
Global Trade Identification Number
Inlet connection type
Flare or
Item dimensions L x W x H
20.3 x 20.3 x
Manufacturer
ACDelco

🔧GM OE exact fit & form

⚙️Durable aluminum construction

❄️Precision refrigerant flow control

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$197.16

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Stay cool, drive confident—GM-grade A/C precision at your fingertips!

LIGHTWEIGHT DURABLE - Crafted from premium aluminum for long-lasting reliability without adding bulk.
TRUSTED BY PROFESSIONALS - Rated 4.7 stars with proven quick fixes—get your A/C back in minutes and join the satisfied drivers.
COMPLETE INSTALLATION KIT - Includes expansion valve, evaporator seals, stud, and bolts—everything you need in one package.
SEAMLESS GM OE COMPATIBILITY - Engineered to GM specifications for flawless fit and function—no guesswork, just perfect performance.
OPTIMIZED REFRIGERANT METERING - Controls refrigerant flow precisely to keep your A/C system running cool and efficient.

The ACDelco 15-51369 GM Original Equipment Air Conditioning Expansion Valve Kit is a complete, GM-recommended replacement designed to ensure optimal refrigerant flow and A/C performance. Manufactured to exact GM OE specifications, this durable aluminum kit includes all necessary components for a seamless installation, delivering reliable cooling and long service life trusted by professionals and vehicle owners alike.

Specifications

ASIN	B01IU5GOW4
Brand	GM GENUINE PARTS
Customer Reviews	4.6 out of 5 stars 19 Reviews
Exterior Finish	Aluminium
Exterior finish	Aluminium
Global Trade Identification Number	00808709536000
Inlet Connection Type	Flare or Compression
Inlet connection type	Flare or Compression
Item Dimensions	20.3 x 20.3 x 2.5 centimetres
Item Weight	0.5 Pounds
Item dimensions L x W x H	20.3 x 20.3 x 2.5 centimetres
Manufacturer	ACDelco
Material	Brass , Steel , or Aluminum
Model Number	15-51369
Number of Pieces	4
Number of Ports	2
Outlet Connection Type	Flare or Compression
Outlet connection type	Flare or Compression
Part Number	84104355
Set Name	A/C Expansion Valve Kit
Size	8 inches x 8 inches x 1 inch
Smart Home Compatibility	Not Smart Home Compatible
Specification Met	oe
Thread Size	8 inches
Thread Type	Stud and Bolt
UPC	808709536000
Unit Count	1.0 count
Valve Type	Expansion Valve

Reviews

G**N

Good supplier with quality product

The part came on time as promised

12.05.2025

H**E

Great product

Fixed the ac on my truck in just minutes!

6.07.2024

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