What Vehicles Fit the NPAUTO UF-414 Round Ignition Coil Set?

Based on the supplied fitment data, applications include select configurations of the following vehicles.

Chevrolet Applications

• Chevrolet Silverado 1500
• Chevrolet Silverado 1500 HD
• Chevrolet Silverado 2500 / 2500 HD
• Chevrolet Silverado 3500 / 3500 HD
• Chevrolet Tahoe
• Chevrolet Suburban
• Chevrolet Avalanche
• Chevrolet Express
• Chevrolet TrailBlazer
• Chevrolet Corvette
• Chevrolet Camaro
• Chevrolet Colorado
• Chevrolet Impala SS
• Chevrolet Monte Carlo SS
• Chevrolet SSR

GMC Applications

• GMC Sierra 1500
• GMC Sierra 1500 HD
• GMC Sierra 2500 / 2500 HD
• GMC Sierra 3500 / 3500 HD
• GMC Yukon
• GMC Yukon XL
• GMC Envoy
• GMC Canyon
• GMC Savana

Cadillac Applications

• Cadillac Escalade
• Cadillac Escalade ESV
• Cadillac Escalade EXT
• Cadillac CTS-V

Additional GM-Related Applications

Depending upon year and engine configuration, the UF-414-style coil is also listed for select:

• Hummer H2
• Hummer H3
• Hummer H3T
• Buick Allure
• Buick LaCrosse
• Buick Rainier
• Isuzu Ascender
• Pontiac G8
• Pontiac Grand Prix
• Saab 9-7X

The advertised application range broadly covers 2005–2017, but not every model above uses this coil for every year or every engine.

Always verify year + model + engine + existing coil/OE number before purchase.

Fits Popular GM 4.8L, 5.3L, 6.0L and 6.2L Applications

One reason this coil set has such broad appeal is the enormous number of vehicles GM produced around its V8 engine families.

Common displacements associated with the advertised applications include:

4.8L V8

The 4.8L was widely used in GM trucks and vans where owners wanted V8 capability without moving to the larger engines.

5.3L V8

The 5.3L is arguably the star of this group.

Millions of Silverado, Sierra, Tahoe, Suburban, Yukon and related vehicles have been powered by variations of the 5.3L V8.

Its combination of durability, availability and aftermarket support has also made the 5.3L extremely popular for engine swaps.

6.0L V8

The 6.0L became particularly popular in heavier-duty truck, SUV and performance applications.

These engines are also favorites among enthusiasts because displacement is apparently one of those situations where “a little more” tends to become “well, while we’re already here…”

6.2L V8

Select 6.2L applications may also use this coil configuration, but fitment deserves extra attention because later 6.2L engines can use different ignition components.

Do not assume every GM 6.2L uses UF-414 coils.

What Does an Ignition Coil Do?

Each ignition coil acts as a transformer.

The vehicle’s electrical system operates at relatively low voltage, but the spark plug requires thousands of volts to create a spark capable of jumping its electrode gap.

The ignition coil creates that high voltage.

On these GM V8 applications, individual coils allow the engine-management system to precisely control ignition for each cylinder.

When all eight coils work correctly, you get consistent combustion.

When one doesn’t, your V8 may temporarily decide seven cylinders are plenty.

They’re not.

Symptoms of a Bad GM Ignition Coil

A failing ignition coil can produce:

• Engine misfire
• Rough idle
• Shaking
• Hesitation
• Poor acceleration
• Loss of power
• Check Engine light
• Flashing Check Engine light
• Hard starting
• Poor fuel economy
• Raw fuel smell
• Misfire under load

Before replacing coils, read 7 Bad Ignition Coil Symptoms You Should Never Ignore on My Pro Street.

That guide explains how coil failure can produce rough idle, hesitation, power loss, poor fuel economy and P0300–P0308 misfire codes.

P0300 Random Misfire on Chevy and GMC V8 Engines

A P0300 Random/Multiple Cylinder Misfire is one of the most common codes associated with an engine that’s running poorly.

However, P0300 does not automatically mean the ignition coils are bad.

The code means the PCM has detected misfires occurring across multiple cylinders or in a pattern it cannot isolate to one cylinder.

Possible causes include:

• Weak ignition coils
• Worn spark plugs
• Vacuum leaks
• Fuel injector problems
• Low fuel pressure
• Intake leaks
• Compression problems
• Electrical faults
• Engine mechanical problems

Use Pro Street’s live P0300 Random/Multiple Cylinder Misfire Causes & Fixes guide before firing the parts cannon.

LS1 Owners: We Have a Specific P0300 Guide

If you’re shopping coils for an LS1-powered application such as a compatible Corvette or other LS1 vehicle, Pro Street also has a dedicated LS1 P0300 Random Misfire Guide.

That article examines LS-specific possibilities including ignition problems, vacuum leaks and other causes of random misfires.

It’s particularly useful because a P0300 on an LS engine doesn’t necessarily mean eight coils simultaneously woke up one morning and chose violence.

What About P0301 Through P0308?

Cylinder-specific misfire codes can make diagnosis easier.

On a V8, you may encounter:

• P0301 – Cylinder 1 Misfire
• P0302 – Cylinder 2 Misfire
• P0303 – Cylinder 3 Misfire
• P0304 – Cylinder 4 Misfire
• P0305 – Cylinder 5 Misfire
• P0306 – Cylinder 6 Misfire
• P0307 – Cylinder 7 Misfire
• P0308 – Cylinder 8 Misfire

A cylinder-specific code tells you where the misfire is occurring, not necessarily which component failed.

That’s an important distinction.

A P0304 can result from a bad coil, but it can also be caused by the spark plug, injector, wiring or mechanical condition of cylinder four.

Pro Street’s Complete OBD-II Code Guide provides additional diagnostic-code resources.

How to Determine Whether the Coil Is Actually Bad

One advantage of GM’s individual ignition-coil arrangement is that you can often move components between cylinders during diagnosis.

If one cylinder has a consistent misfire:

1. Record the trouble codes and freeze-frame information.
2. Identify the misfiring cylinder.
3. Inspect its spark plug, coil and electrical connection.
4. Swap the suspected coil with one from a known-good cylinder.
5. Reassemble the engine correctly.
6. Run the engine and monitor misfire data.
7. Rescan the PCM.

If the misfire moves with the coil, the coil becomes a strong suspect.

If the misfire remains on the original cylinder, keep diagnosing.

This simple test can save a surprising amount of money.

Why Replace All Eight Ignition Coils?

This NPAUTO package contains eight coils, allowing the entire V8 ignition-coil set to be refreshed simultaneously.

That can make sense when:

• The vehicle has high mileage
• Multiple coils have already failed
• The existing coils are the same age
• Several coils show physical deterioration
• You’re performing a complete ignition-system refresh
• The engine is being installed into a swap project

However, you don’t automatically need eight new coils because one failed.

If seven relatively new OE-quality coils are functioning perfectly and one coil has conclusively failed, replacing the failed component may be completely reasonable.

A complete set becomes more attractive as age and mileage increase.

Replace or Inspect the Spark Plugs Too

Don’t overlook the spark plugs.

A worn spark plug develops a larger effective gap and can require greater voltage to fire.

That increases demand on the ignition coil.

If you’re replacing an entire coil set on a high-mileage GM V8, inspect the plugs for:

• Worn electrodes
• Excessive gap
• Carbon buildup
• Oil fouling
• Fuel fouling
• Cracked porcelain
• Overheating
• Carbon tracking

Pro Street’s live How to Pick Spark Plugs for Your Build guide explains plug selection, heat range and why the correct spark plug matters for both stock and modified engines.

Don’t Forget the Plug Wires

Unlike many modern engines where the coil sits directly on the spark plug, numerous GM LS-style applications use short spark-plug wires between the individual coils and plugs.

Those wires can deteriorate too.

Heat, age and resistance can create:

• Misfires
• Rough idle
• Hesitation
• Hard starting
• Power loss

Read When to Replace Spark Plug Wires: 7 Signs if you’re refreshing the ignition system.

Replacing eight coils while ignoring eight ancient plug wires cooked next to the exhaust manifolds would be… ambitious.

Why GM Truck Owners Should Pay Attention to Misfires Under Load

A weak ignition system can become especially noticeable when the engine is under load.

You might experience misfires while:

• Towing
• Accelerating uphill
• Passing
• Merging onto the highway
• Carrying a heavy load
• Applying wide-open throttle

Higher cylinder pressure makes it more difficult for the spark to jump the plug gap.

That means an ignition coil or plug wire that appears functional during idle can struggle once engine load increases.

For Silverado, Sierra, Tahoe, Yukon and Suburban owners, that’s an important diagnostic clue.

LS Swap Applications

UF-414-style coils also matter to the enormous LS-swap community.

GM V8 engines have found their way into:

• Nissan 240SXs
• Mazda RX-7s
• BMWs
• Mustangs
• Classic trucks
• Hot rods
• Drift cars
• Track cars
• Pretty much anything possessing an engine bay and an owner with questionable restraint

But engine-swap fitment should be determined by the engine’s coil configuration, not the chassis receiving the engine.

If you’ve installed a 5.3L into another vehicle, identify the engine and coil part number before ordering.

NPAUTO UF-414 Interchange Numbers

The advertised interchange numbers include:

UF-414
UF414
12573190
12578224
12699382
5C1555
610-00159
8125731900

Comparing these numbers against the existing coils is one of the best ways to reduce ordering mistakes.

Who Should Buy This 8-Piece Ignition Coil Set?

The NPAUTO round ignition coil set is best suited for owners of compatible GM V8 applications who:

• Have diagnosed one or more weak ignition coils
• Want to replace all eight aging coils
• Are performing an ignition-system overhaul
• Have a high-mileage truck or SUV
• Are refreshing an LS-based engine
• Need UF-414-compatible round coils
• Are preparing an engine for an LS swap

The complete eight-piece package makes considerably more sense for a full refresh than buying individual coils one at a time.

Is the NPAUTO 8-Piece GM V8 Coil Set Worth It?

For a compatible Chevrolet, GMC, Cadillac or related GM V8 application, this NPAUTO 8-piece set provides a convenient way to replace an entire set of aging round-style ignition coils.

Its strongest applications include popular GM 4.8L, 5.3L and 6.0L V8 engines, along with specifically compatible 6.2L applications.

The important part is verifying the coil configuration first.

Match your:

vehicle + year + engine + coil style + interchange number.

Once fitment is confirmed, a complete eight-coil replacement can make sense for a high-mileage V8 experiencing ignition-related misfires, hesitation or deteriorating performance.

Just diagnose before replacing.

Because an eight-pack of coils can fix eight bad coils.

It remains stubbornly incapable of fixing one clogged fuel injector.

Shop ignition and performance components at Pro Street Online.