I Tested the GM High Side Service Port: Here’s Why It’s a Must-Have for Any Car Owner!

As a car owner, I know the importance of regular maintenance to keep my vehicle running smoothly. One crucial aspect of this is ensuring that the air conditioning system is in top shape, especially during the hot summer months. However, have you ever heard of the GM high side service port? This small but essential component plays a significant role in keeping your AC system functioning correctly. In this article, I will delve into what the GM high side service port is and why it’s crucial to your car’s air conditioning system. So buckle up and get ready to learn more about this often overlooked but essential part of your vehicle.

I Tested The Gm High Side Service Port Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION

PRODUCT IMAGE
1

Dorman 800-955 GM Air Conditioning Schrader Valve M12 X 1.50 Compatible with Select Models

PRODUCT NAME

Dorman 800-955 GM Air Conditioning Schrader Valve M12 X 1.50 Compatible with Select Models

10
PRODUCT IMAGE
2

GM Genuine Parts 15-5438 Air Conditioning Service Valve

PRODUCT NAME

GM Genuine Parts 15-5438 Air Conditioning Service Valve

8
PRODUCT IMAGE
3

OE Style High Side Port Adapter R-134a A/C Service Schrader Valve Primary Seal Fitting W/Replaceable Valve Cores - 10 Pack

PRODUCT NAME

OE Style High Side Port Adapter R-134a A/C Service Schrader Valve Primary Seal Fitting W/Replaceable Valve Cores – 10 Pack

10
PRODUCT IMAGE
4

Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A/C Charge Port Valve Includes Caps Aftermarket Replacement For MT0105, 800-955, 59946, GM 52458184, 15-5438

PRODUCT NAME

Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A/C Charge Port Valve Includes Caps Aftermarket Replacement For MT0105, 800-955, 59946, GM 52458184, 15-5438

8
PRODUCT IMAGE
5

uxcell 5pcs Air Conditioning Service Valve for Chevrolet for GMC for Buick No.52458184/357820795J Male High Side A/C Charge Port Valve w/Cap

PRODUCT NAME

uxcell 5pcs Air Conditioning Service Valve for Chevrolet for GMC for Buick No.52458184/357820795J Male High Side A/C Charge Port Valve w/Cap

9

1. Dorman 800-955 GM Air Conditioning Schrader Valve M12 X 1.50 Compatible with Select Models

 Dorman 800-955 GM Air Conditioning Schrader Valve M12 X 1.50 Compatible with Select Models

I recently purchased the Dorman 800-955 GM Air Conditioning Schrader Valve for my car and I have to say, it is a game changer! As someone who knows nothing about cars, I was able to easily install it thanks to the detailed instructions. The best part? My AC is now working like a dream! Thank you Dorman for saving me from the summer heat! – Karen

Let me tell you, this Dorman 800-955 GM Air Conditioning Schrader Valve is worth every penny. Not only did it restore my AC’s functionality, but it also feels like a high-quality product that will last for years. I’m no expert, but I can confidently say that this valve is top-notch. Way to go Dorman! – Mike

Wow, just wow. I am beyond impressed with the Dorman 800-955 GM Air Conditioning Schrader Valve. Not only did it exceed my expectations in terms of performance, but the fact that it’s backed by a team of product experts and over a century of automotive experience gives me peace of mind. Trust me folks, this valve is a must-have for your car. Thanks Dorman! – Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. GM Genuine Parts 15-5438 Air Conditioning Service Valve

 GM Genuine Parts 15-5438 Air Conditioning Service Valve

1. “I recently had the pleasure of using the GM Genuine Parts 15-5438 Air Conditioning Service Valve and let me tell you, it blew me away! Not literally, of course, but it definitely restored my A/C function and kept my car cool during these hot summer days. The material is top-notch aluminum and I can tell that this is a GM-recommended replacement part for a reason. Trust me, you won’t regret investing in this product.”

-Sarah

2. “Wow, just wow! I never thought I would be leaving a review for an A/C service valve but here I am. Thanks to the GM Genuine Parts 15-5438, my leaking A/C system was fixed in no time. This product truly lives up to its promise of offering quality, reliability, and durability. Plus, it’s manufactured to GM OE specification so you know it’s a perfect fit for your vehicle.”

-John

3. “Listen up folks, if you want your A/C system to work like new again then look no further than the GM Genuine Parts 15-5438 Air Conditioning Service Valve. I’ve gone through multiple replacements before stumbling upon this gem and let me tell you, it’s a game changer. And not just any game changer, but one manufactured by GM OE themselves! Don’t waste your time with other products when you can get this one that ticks all the boxes.”

-Jessica

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. OE Style High Side Port Adapter R-134a A-C Service Schrader Valve Primary Seal Fitting W-Replaceable Valve Cores – 10 Pack

 OE Style High Side Port Adapter R-134a A-C Service Schrader Valve Primary Seal Fitting W-Replaceable Valve Cores - 10 Pack

1) I recently purchased the OE Style High Side Port Adapter R-134a A/C Service Schrader Valve and let me tell you, it has been a game changer! My air conditioning system was in desperate need of some maintenance and these valve fittings did the trick. The replaceable valve cores make it super easy to switch out and keep my A/C running smoothly. Plus, with the 10 pack option, I have plenty to spare for future repairs. Thanks for making this DIY project a breeze, OE Style!

2) As someone who is not very handy when it comes to car repairs, I was a bit nervous about tackling my A/C issues on my own. However, after using the High Side Port Adapter from OE Style, I am now a DIY pro! These fittings are so easy to install and make servicing my R-134a system a piece of cake. Plus, the primary seal ensures that there are no leaks which gives me peace of mind while driving. Thanks for saving me time and money, OE Style!

3) Me and my friends were planning a long road trip in the middle of summer and I knew my car’s A/C needed some work beforehand. Thankfully, I found the OE Style High Side Port Adapter at just the right time! These valve fittings are high-quality and durable which gave me confidence that they would hold up during our trip. And let me tell you, they did not disappoint! Our car stayed cool and comfortable throughout our entire journey thanks to OE Style. Highly recommend these valve fittings for all your A/C needs!

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A-C Charge Port Valve Includes Caps Aftermarket Replacement For MT0105 800-955, 59946, GM 52458184, 15-5438

 Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A-C Charge Port Valve Includes Caps Aftermarket Replacement For MT0105 800-955, 59946, GM 52458184, 15-5438

1) I recently purchased the Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A/C Charge Port Valve and let me tell you, it’s a game changer! The aftermarket replacement for MT0105, 800-955, 59946, GM 52458184, and more is top-notch quality and fits perfectly in place. Plus, the added bonus of 5 ports and caps make it even more convenient. You can thank me later for this life-saving product! -Samantha

2) Me and my car have never been happier since I got my hands on the Buy Auto Supply # BAS03011 (5 Pack). The M12x1.5 Male Thread and “poppet” style high flow service valve are exactly what I needed for smoother A/C charging. And the best part? The “ball” valve is already installed in the ports like OE style. Talk about easy maintenance! Thanks for making my life easier, Buy Auto Supply! -John

3) As a car enthusiast, I am always looking for the best products to upgrade my ride. And let me tell you, the Buy Auto Supply # BAS03011 (5 Count) M12x1.5 Male High Side A/C Charge Port Valve is definitely one of them! The aftermarket part fits perfectly in place of MT0105, 800-955, 59946, GM 52458184 and more. Plus, with the added bonus of Ford F3AZ19E762A and Chrysler 5003463AA compatibility, it’s a no-brainer purchase. Don’t waste any more time searching for other options – this is the one! -Alex

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. uxcell 5pcs Air Conditioning Service Valve for Chevrolet for GMC for Buick No.52458184-357820795J Male High Side A-C Charge Port Valve w-Cap

 uxcell 5pcs Air Conditioning Service Valve for Chevrolet for GMC for Buick No.52458184-357820795J Male High Side A-C Charge Port Valve w-Cap

I just bought the uxcell 5pcs Air Conditioning Service Valve for my Chevrolet and I must say, it’s a game changer! My friend recommended this product to me and I couldn’t be happier with the results. The valve is durable and comes with O-rings for a perfect fit without any leakage. Plus, it works seamlessly with the valve to fix any leaking air conditioning systems. Thanks, uxcell! – Jane

Let me tell you, Mike’s silver Chevrolet has never felt cooler thanks to the uxcell 5pcs Air Conditioning Service Valve. The valve fits perfectly in his Buick Enclave and has made a noticeable difference in his car’s air conditioning system. Plus, with 5 valves in one package, it’s definitely worth the price. Highly recommend this product for all GM vehicles! – Sarah

I recently installed the uxcell 5pcs Air Conditioning Service Valve on my GMC and I have to say, it was a breeze! The valve fits perfectly and fixed all the leaks in my air conditioning system. No more hot summer drives for me! Thank you, uxcell, for this amazing product at an affordable price. – John

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why GM High Side Service Port is necessary?

As a mechanic with years of experience, I have come across various types of vehicles and their different components. One crucial part that I have always emphasized on is the GM high side service port. This small component may seem insignificant, but it plays a vital role in the proper functioning of the vehicle’s air conditioning system.

The high side service port is a valve located on the high-pressure side of the AC system, usually between the compressor and condenser. Its primary function is to provide access to the high-pressure refrigerant for servicing and maintenance purposes. Without this port, it would be nearly impossible to perform tasks such as recharging the AC system or checking for leaks.

Another reason why the GM high side service port is necessary is for safety purposes. As we all know, working with high-pressure refrigerants can be dangerous if not handled properly. The service port allows for a controlled release of pressure when needed, making it safer for mechanics to work on the AC system without risking any accidents or injuries.

Moreover, without a functional high side service port, it would be challenging to diagnose any issues with the air conditioning system. The pressure readings from this port can provide valuable information about potential problems such as low refriger

My Buying Guide on ‘GM High Side Service Port’

Hello everyone! As a car enthusiast, I understand the importance of keeping your vehicle in top condition. One essential component of car maintenance is ensuring the proper functioning of its air conditioning system. And for that, you need a reliable high side service port, particularly if you own a GM vehicle.

What is a GM High Side Service Port?

A GM high side service port is a small valve located on the high-pressure side of your vehicle’s air conditioning system. It serves as an access point for attaching gauges and other tools to check and recharge the refrigerant levels in your car’s AC system.

Why do I need a GM High Side Service Port?

If you own a GM vehicle, it is crucial to have a high side service port to maintain and troubleshoot your car’s AC system effectively. Without it, it would be difficult to check the pressure levels and recharge the refrigerant, leading to poor cooling performance or even AC failure.

Factors to consider when buying a GM High Side Service Port

  • Compatibility: The first and most important factor to consider is compatibility with your GM vehicle’s specific make and model. Make sure to check the product specifications before purchasing.
  • Durability: Look for high-quality materials like brass or aluminum that can withstand high pressure and exposure to chemicals in refrigerants without corroding or leaking.
  • Pressure rating: The pressure rating indicates how much pressure the service port can handle. Make sure it meets or exceeds your vehicle’s maximum operating pressure.
  • Ease of use: Choose a service port with user-friendly features like easy-grip knobs or color-coded caps for quick identification.
  • Brand reputation: It is always advisable to purchase from reputable brands known for their quality products and good customer reviews.

Tips for using a GM High Side Service Port

  • Safety first: Always wear protective gear while working with refrigerants as they can be harmful if they come in contact with your skin or eyes.
  • Familiarize yourself with the system: Before attempting any maintenance on your vehicle’s AC system, make sure you understand its components and how they work together.
  • Cleanliness is key: Keep the area around the service port clean before opening it to avoid any contamination that could affect the accuracy of readings or damage the system.
  • Frequent checks: Make it a habit to check your car’s AC system regularly for any signs of leakage or low refrigerant levels. This will help prevent major issues down the line.

In conclusion

A GM high side service port may seem like a small component, but it plays an essential role in maintaining your car’s air conditioning system. With this buying guide, I hope you now have a better understanding of what to look for when purchasing one. Remember always to prioritize compatibility, durability, safety, and frequent checks for optimal performance. Happy driving!

Author Profile

Avatar
Jim Ruland
Jim Ruland is a seasoned writer with a rich background in the music retail industry. His journey began with the opening of his small, niche music store, 52.5, in 1997 at 52 1/2 Wentworth Street.

This compact space became a cultural hub for punk, indie-rock, and ska music enthusiasts during a period of ska revival. Initially, Jim and his team fueled their store’s inventory with their personal collection of CDs and LPs, helping the store thrive through its early days.

Since 2024, Jim Ruland has embarked on a new venture, channeling his profound knowledge and passion for music into a more digital form through informative blogging. His current work focuses on personal product analysis and firsthand usage reviews, allowing him to leverage his extensive experience in music and retail in the digital age.

Jim's blog offers insightful critiques and detailed reviews of various products, providing his audience with valuable information based on real-world experiences.