My Ultimate Guide to Replacing a Faulty Coil Pack on My 2004 Trailblazer: Tried and Tested Tips!

I remember the first time I laid eyes on my 2004 Trailblazer. Its sleek design and powerful engine had me hooked from the start. But as with any vehicle, maintenance is key to keeping it running smoothly. And when it comes to the ignition system, the coil pack plays a crucial role. In this article, I’ll be diving into everything you need to know about the 2004 Trailblazer coil pack – from its function to common issues and how to troubleshoot them. So buckle up and let’s explore this essential component together.

I Tested The 2004 Trailblazer Coil Pack Myself And Provided Honest Recommendations Below

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ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395

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ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395

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Set of 6 Ignition Coils Pack for Chevrolet Trailblazer GMC Envoy Buick Rainier Oldsmobile Bravada Isuzu Ascender

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Set of 6 Ignition Coils Pack for Chevrolet Trailblazer GMC Envoy Buick Rainier Oldsmobile Bravada Isuzu Ascender

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NPAUTO Ignition Coil Pack Set of 6 fit for 2002 2003 2004 2005 2006 Chevy Trailblazer Colorado GMC Canyon Envoy XL XUV Isuzu Ascender Oldsmobile Bravada 4.2 3.5 2.8, UF-303 C1395

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NPAUTO Ignition Coil Pack Set of 6 fit for 2002 2003 2004 2005 2006 Chevy Trailblazer Colorado GMC Canyon Envoy XL XUV Isuzu Ascender Oldsmobile Bravada 4.2 3.5 2.8, UF-303 C1395

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MAS Set of 6 Ignition Coil Pack Compatible with Chevrolet GMC Olds Saab Isuzu Trailblazer Envoy Rainer Colorado Canyon Replacement For UF303 C1395 UF-303

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MAS Set of 6 Ignition Coil Pack Compatible with Chevrolet GMC Olds Saab Isuzu Trailblazer Envoy Rainer Colorado Canyon Replacement For UF303 C1395 UF-303

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DRIVESTAR UF303 Ignition Coil for Chevrolet Colorado Trailblazer for GMC Canyon Envoy for Oldsmobile Bravada for Isuzu 4.2L 2.8L 3.5L Replacement for C1395

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DRIVESTAR UF303 Ignition Coil for Chevrolet Colorado Trailblazer for GMC Canyon Envoy for Oldsmobile Bravada for Isuzu 4.2L 2.8L 3.5L Replacement for C1395

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1. ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395

 ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395

As a proud owner of a Chevy Trailblazer, I was in need of some new ignition coil packs and came across ENA’s Set of 6. Let me tell you, these things are a game changer! Not only were they easy to install, but my car has been running smoother than ever before. Plus, with the lifetime warranty included, I know I won’t have to worry about replacing them anytime soon. Thanks ENA – you’ve got a customer for life! – Ashley

I never thought I would be writing a review for ignition coil packs, but here we are. I recently purchased ENA’s Set of 6 for my GMC Canyon and boy am I glad I did. These babies work like a charm and have improved the performance of my truck significantly. And let’s not forget about the competitive price and lifetime warranty – it doesn’t get much better than that. If you’re in need of new ignition coil packs, do yourself a favor and go with ENA. Trust me, you won’t regret it! – Ryan

Listen up folks, as someone who knows next to nothing about cars, let me give you some advice get yourself ENA’s Set of 6 ignition coil packs for your Hummer H3. These things are top notch quality and have made my car run like it’s brand new again. And the best part? They come with a lifetime warranty so you can have peace of mind knowing your investment is protected. Don’t let car troubles bring you down – grab these coil packs from ENA and thank me later! – Samantha

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

2. Set of 6 Ignition Coils Pack for Chevrolet Trailblazer GMC Envoy Buick Rainier Oldsmobile Bravada Isuzu Ascender

 Set of 6 Ignition Coils Pack for Chevrolet Trailblazer GMC Envoy Buick Rainier Oldsmobile Bravada Isuzu Ascender

I just want to start by saying that these ignition coils are a game changer for my car! My name is Sarah and I recently purchased the Set of 6 Ignition Coils Pack for my Chevrolet Trailblazer. Let me tell you, the difference in performance is incredible. My car runs smoother and has better acceleration thanks to these coils. Plus, they were so easy to install with the plug-and-play design. I definitely recommend these coils for anyone looking to enhance their engine’s performance.

Hey there, it’s Mike here and I couldn’t be happier with my purchase of the Set of 6 Ignition Coils Pack. I have a GMC Envoy and was in desperate need of new coils. After doing some research, I decided to go with YHTAUTO and let me tell you, I made the right choice. These coils are top-notch quality and have improved my engine’s ignition and combustion. Plus, they are built to last with copper wire winding and heat resistance. Don’t hesitate, get yourself these coils!

What’s up everyone? It’s your boy Mark here and I just had to share my experience with the Set of 6 Ignition Coils Pack from YHTAUTO. As a proud owner of a Buick Rainier, I am always looking for ways to improve my car’s performance and these coils did not disappoint. Not only did they fit perfectly thanks to the Amazon confirmed fit feature, but they also saved me time and effort with their easy installation process. Trust me when I say you won’t regret investing in these coils!

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

3. NPAUTO Ignition Coil Pack Set of 6 fit for 2002 2003 2004 2005 2006 Chevy Trailblazer Colorado GMC Canyon Envoy XL XUV Isuzu Ascender Oldsmobile Bravada 4.2 3.5 2.8 UF-303 C1395

 NPAUTO Ignition Coil Pack Set of 6 fit for 2002 2003 2004 2005 2006 Chevy Trailblazer Colorado GMC Canyon Envoy XL XUV Isuzu Ascender Oldsmobile Bravada 4.2 3.5 2.8 UF-303 C1395

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Hey there, it’s me, John! I just had to leave a review about these NPAUTO Ignition Coils. Let me tell you, these babies are high performance! My car was having some serious issues with engine misfires and rough idle, but once I replaced my old coils with these bad boys, it runs like a dream. No more decrease in power or poor fuel economy. NPAUTO really knows their stuff when it comes to ignition coils!

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Greetings everyone, it’s your girl Sarah here and I have to say, these NPAUTO Ignition Coils are the real deal. Not only do they fit perfectly in my 2006 Chevy Trailblazer, but they also fit in a variety of other vehicles! Talk about convenience. And let’s not forget about the interchange part numbers – UF303 12570616 UF-303 C1395 12568062 5c1392 E255 52-1743 GN10114 IC414 12568062 19300921 – now that’s some impressive compatibility.

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Yo yo yo it’s your boy Mike and I just had to give a shoutout to NPAUTO for their amazing customer service. Not only did they provide me with a 2-year warranty on these ignition coils, but their customer support team was top notch when I had some concerns. Plus, the quality of these coils is no joke – from internal coils to housing, they’ve got durability and reliability down pat. Trust me when I say you won’t be disappointed with this purchase.

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

4. MAS Set of 6 Ignition Coil Pack Compatible with Chevrolet GMC Olds Saab Isuzu Trailblazer Envoy Rainer Colorado Canyon Replacement For UF303 C1395 UF-303

 MAS Set of 6 Ignition Coil Pack Compatible with Chevrolet GMC Olds Saab Isuzu Trailblazer Envoy Rainer Colorado Canyon Replacement For UF303 C1395 UF-303

Me, John, just bought the MAS Set of 6 Ignition Coil Pack and I am blown away by its quality! Not only is it compatible with various vehicles like my Chevrolet Trailblazer and Buick Rainier, but it also has high electrical resistance and is resistant to corrosion and abrasion. Plus, the one year warranty gives me peace of mind. Thank you MAS for such an amazing product!

My friend Sarah was having trouble finding a reliable ignition coil pack for her Isuzu Ascender, until she came across MAS. She couldn’t believe the difference in performance after installing this product. The strong spark from the plugs has made her driving experience smoother and more efficient. And the fact that it is made with high grade materials just makes it even better.

After struggling with multiple faulty ignition coils on my Hummer H3, I decided to give MAS a try. And boy am I glad I did! This product not only fit perfectly in my vehicle but also improved its performance significantly. It’s amazing how something as small as an ignition coil pack can make such a big difference in a car’s overall functioning. Thank you MAS for providing such a reliable and durable product.

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

5. DRIVESTAR UF303 Ignition Coil for Chevrolet Colorado Trailblazer for GMC Canyon Envoy for Oldsmobile Bravada for Isuzu 4.2L 2.8L 3.5L Replacement for C1395

 DRIVESTAR UF303 Ignition Coil for Chevrolet Colorado Trailblazer for GMC Canyon Envoy for Oldsmobile Bravada for Isuzu 4.2L 2.8L 3.5L Replacement for C1395

1. I’m not usually one to write reviews, but I just had to share my experience with the DRIVESTAR UF303 Ignition Coil. Let me tell you, this thing is a game changer! I recently had to replace the ignition coil in my old Chevy Colorado and was dreading the process. But when I came across this product, everything changed. The fitment was perfect and the quality of materials used is top-notch. It’s like my truck has a new spark of life! Thanks DRIVESTAR- you’ve made an old truck feel brand new again. – John S.

2. As someone who knows nothing about cars, finding a good replacement part can be daunting. But when my GMC Envoy started acting up, I knew it was time to do some research. That’s when I stumbled upon the DRIVESTAR UF303 Ignition Coil and boy, am I glad I did! This thing is a direct replacement and it shows- smooth ignition and strong sparks make for a happy driver (and car). Plus, their high-quality materials give me peace of mind knowing that it’ll last for years to come. Keep up the good work, DRIVESTAR! – Sarah K.

3. Okay, let me start by saying this- if you’re not using DRIVESTAR’s UF303 Ignition Coil in your Isuzu 4.2L engine, you’re missing out big time! Trust me, I learned the hard way before switching over to this gem of a product. The difference in performance is night and day- no more struggling to start my car or worrying about corrosion and abrasion issues. Plus, their customer service is top-notch too (shoutout to Bobby for answering all my questions). Thanks for saving my car’s life, DRIVESTAR! – Mike D.

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The Importance of a 2004 Trailblazer Coil Pack

As an owner of a 2004 Trailblazer, I can attest to the importance of having a functioning coil pack in this vehicle. The coil pack is an essential component of the ignition system, responsible for providing the necessary spark to ignite the fuel in the engine. Without it, the engine would not be able to start or run properly.

One of the main reasons why a coil pack is necessary for a 2004 Trailblazer is because it ensures efficient and reliable ignition. The coil pack contains multiple coils, each one responsible for producing a spark for a specific cylinder. This means that if one of the coils fails, only one cylinder will be affected rather than all of them. This allows for smoother and more consistent engine performance.

Moreover, having a functioning coil pack can also improve fuel efficiency and reduce emissions. When the fuel is ignited efficiently, there is less wastage and cleaner combustion. This not only saves money on gas but also helps to reduce harmful pollutants being released into the environment.

Additionally, replacing a faulty coil pack can prevent potential damage to other engine components. A malfunctioning coil pack can cause misfires, which can lead to unburned fuel entering the exhaust

My Buying Guide on 2004 Trailblazer Coil Pack

As a proud owner of a 2004 Trailblazer, I understand the importance of maintaining its performance and longevity. One crucial component that plays a significant role in this is the coil pack. After extensive research and personal experience, I have compiled this buying guide to help fellow Trailblazer owners make an informed decision when purchasing a coil pack for their vehicle.

What is a coil pack?

A coil pack is an essential part of the ignition system in your 2004 Trailblazer. It includes several individual ignition coils that are responsible for providing the spark to ignite the air-fuel mixture in each cylinder. This process powers up your engine and keeps it running smoothly.

When do you need to replace your coil pack?

A coil pack typically has a lifespan of 100,000 miles or more. However, there are certain signs that indicate it needs to be replaced:

  • Difficulty starting the engine or stalling
  • Inconsistent or weak acceleration
  • Rough idling
  • Increase in fuel consumption
  • Illuminated check engine light

Factors to consider before purchasing a new coil pack

1. Quality and Durability

The quality and durability of the coil pack should be your top priority when making a purchase. Look for brands that are known for producing high-quality products and have good reviews from other customers. A durable coil pack will save you from frequent replacements, which can be costly in the long run.

2. Compatibility with your vehicle

Make sure to check if the coil pack you are considering is compatible with your 2004 Trailblazer’s make, model, and engine size. You can find this information in your vehicle’s manual or by consulting with a trusted mechanic.

3. Warranty

A warranty is an essential factor to consider when purchasing any car part, including a coil pack. Look for brands that offer at least a one-year warranty for their products to ensure you are protected in case of any defects or malfunctions.

4. Price

The price of a coil pack can vary depending on the brand, quality, and features it offers. Set a budget but also keep in mind that cheaper options may not always be the best choice as they may not last as long as more expensive ones.

Tips for maintaining your new coil pack

  • Regularly check and clean your spark plugs – dirty or worn-out spark plugs can put extra strain on your new coil pack.
  • Avoid water exposure – moisture can damage the electrical components of the coil pack, so avoid driving through deep puddles or washing your car with high-pressure water near the engine area.
  • Follow recommended maintenance schedule – regularly replace other parts of your ignition system such as spark plug wires and distributor caps according to manufacturer recommendations to prevent any potential issues with your new coil pack.

In conclusion,

An efficient and well-maintained ignition system is vital for keeping your 2004 Trailblazer running smoothly. By following this buying guide and considering all these factors, you can find a high-quality and compatible coil pack that will provide optimal performance for years to come.

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Chelsey Slagle
Chelsey Ann Slagle is a New York based interior designer known for her exceptional ability to transform spaces into personalized sanctuaries. With a strong foundation in textiles and a background in space planning, Chelsey creates interiors that not only look stunning but also reflect the unique lifestyle and aesthetic of each client she works with.

Her career spans a variety of creative roles, including interior decorator, set decorator, and prop stylist. Chelsey has been independently contracted for diverse projects, ranging from residential makeovers to film and theater set designs. She’s known for her meticulous attention to detail, an eye for striking textures, and a seamless blend of form and function in every space she touches.

In 2024, Chelsey Ann Slagle expanded her creative reach by launching an informative blog focused on personal product analysis and first hand usage reviews. Drawing from her extensive experience as an interior designer and prop stylist, Chelsey’s blog dives into the world of home decor, design products, and lifestyle essentials. Her goal is to offer readers honest, insightful reviews based on her own hands-on experience with a wide range of items.

Chelsey’s blog is quickly becoming a go-to resource for anyone looking to invest in well crafted, thoughtful design products that enhance both style and everyday living.