BDFHYK UF303 ignition coil and 5019 LTR5GP platinum spark plug kit for GM Isuzu Inline-5

UF303 coil pack set for Colorado Canyon H3 Isuzu i-350 i-370

5019 LTR5GP platinum spark plugs included with five UF303 ignition coils

BDFHYK five ignition coils and five 5019 spark plugs for 3.5L 3.7L Inline-5

UF303 ignition coil reference 12568062 for listed GM and Isuzu applications

Chevrolet Colorado GMC Canyon Hummer H3 ignition coil spark plug kit UF303

Isuzu i-350 i-370 3.5L 3.7L Inline-5 ignition service kit UF303 5019

BDFHYK UF303 5019 set with 5 ignition coils and 5 platinum spark plugs

BDFHYK Ignition Coil UF303 and Iridium Plugs 5019 For Isuzu i-370 i-350,Chevy Colorado, Canyon, H3 3.5L 3.7L

$88.99

Type Ignition Coil + Spark Plug Set
SKU BDDLZ-BD-05-07370-CK
OE Number For Coil: UF303, 12568062, 5C1392, E255, 52-1743, GN10114, IC414, 12568062, 19300921, 8-12568-062-0, 48844, 8Q5, 1788390, C642, C1395
OE Number For Spark plug:5019, LTR5GP

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Technical Specifications

Brand	BDFHYK
Product Type	Ignition Coil + Spark Plug Kit
Primary Coil Reference	UF303
Spark Plug Reference	5019 / LTR5GP
Package Quantity	5 Coils + 5 Spark Plugs
Includes	5 Ignition Coils + 5 Platinum Spark Plugs
Ignition Coil Construction	Silicon steel core; high-temperature rubber; varnished copper wire
Spark Plug Construction	Single-platinum spark plug; ceramic insulator
Engine	Listed GM / Isuzu 3.5L and 3.7L Inline-5 applications
Listed Vehicle Fitment	2004-2006 Chevrolet Colorado 3.5L Inline-5; 2004-2006 GMC Canyon 3.5L Inline-5; 2006 Hummer H3 3.5L Inline-5; 2006 Isuzu i-350 3.5L Inline-5; 2007-2008 Isuzu i-370 3.7L Inline-5
OE / Interchange References	UF303; 12568062; 19300921; 8-12568-062-0; 5C1392; E255; 52-1743; GN10114; IC414; 48844; 1788390; C642; C1395; 5019; LTR5GP
Common Service Scenarios	Misfire, rough idle, hard starting or hesitation after diagnosis supports ignition service
Fitment Checks	Confirm exact year/model/3.5L or 3.7L Inline-5 engine, connector, coil body/mounting/boot and spark plug reference
Installation Checks	Follow exact GM or Isuzu service information for spark plug gap and torque
Important Note	A misfire DTC does not prove coil failure; other electrical, fuel, air or mechanical faults can cause similar symptoms

UF303 Ignition Coil & 5019 LTR5GP Platinum Spark Plug Kit for GM & Isuzu Inline-5

Misfire, rough idle, hard starting or hesitation can involve worn ignition components, while similar symptoms can also come from wiring, injectors, fuel delivery, intake leaks, sensors or mechanical faults. This BDFHYK UF303 ignition coil and 5019 / LTR5GP platinum spark plug kit contains five coils and five plugs for listed GM and Isuzu 3.5L and 3.7L Inline-5 applications. Confirm the exact engine, original coil and spark plug references before ordering.

UF303 / 5019 GM & Isuzu Inline-5 Fitment

Chevrolet Colorado 2004-2006 — listed 3.5L Inline-5 applications
GMC Canyon 2004-2006 — listed 3.5L Inline-5 applications
Hummer H3 2006 — 3.5L Inline-5
Isuzu i-350 2006 — 3.5L Inline-5
Isuzu i-370 2007-2008 — 3.7L Inline-5

What Is Included in the UF303 / 5019 Inline-5 Kit?

5 ignition coils
5 5019 / LTR5GP platinum spark plugs

UF303 Coil & 5019 Spark Plug Reference Numbers

Ignition coil references: UF303, 12568062, 19300921, 8-12568-062-0, 5C1392, E255, 52-1743, GN10114, IC414, 48844, 1788390, C642, C1395.

Spark plug references: 5019, LTR5GP. This spark plug is a single-platinum design with a ceramic insulator.

Common Ignition Service Scenarios

Misfire or rough idle after diagnostic inspection
Hard starting or hesitation with worn ignition components
Five-cylinder ignition service when coil and spark plug condition supports replacement

How to Confirm UF303 & 5019 Fitment Before Ordering

Confirm the exact year, model and 3.5L or 3.7L Inline-5 engine.
Compare connector keying, coil body, mounting, boot profile and printed references with the original coil.
Confirm 5019 / LTR5GP for the exact engine application and compare with the original spark plug specification.
Verify a five-position Inline-5 ignition service quantity.
Follow the exact GM or Isuzu service information for spark plug gap and torque.

Diagnostic note: A misfire DTC does not prove an ignition coil has failed. Inspect wiring, connectors, injectors, fuel delivery, intake or vacuum leaks, sensors, compression and mechanical timing as applicable.

Difficulty Moderate

Estimated Time 0.5–1 hour

Tools Required

Screwdrivers
Service manual specific to your vehicle
Socket set and ratchet
Wrenches

Pre-Installation Checklist

Stop the engine before disassembling or replacing the ignition coil.
Check the spark plugs and spark plug wires as part of diagnosis.
Keep the installation area clean and dry.
Make sure the ignition coil connections are correct.
Refer to the service manual for your specific vehicle because removal order and connector or fastener details can vary by make and model.
Disconnect the negative battery cable before working on the ignition system.

Installation Steps

Disconnect the battery. Remove the negative battery cable by loosening the clamp bolt with a socket or wrench.
Locate the ignition coils on top of the engine. They may be attached to the engine block or surrounding components.
Disconnect and remove the old ignition coil. Remove the mounting bolts or screws and disconnect the electrical connector(s). The order can vary by vehicle, so follow the vehicle-specific service manual. Remove the old coil once fully disconnected.
If one coil serves multiple spark plugs and has multiple electrical connections, mark or label the connectors so they can be reattached to the correct terminals.
Install the new ignition coil in the reverse order of removal. Secure the mounting bolts or screws and reconnect the electrical connector(s) in the correct positions.
Reconnect the negative battery terminal. Hand-tighten the connection, then tighten the terminal bolt with a socket or wrench. Do not over-tighten.
Close the hood, start the engine with the vehicle in Park, and confirm it starts and idles normally. If it does, test-drive the vehicle.

Post-Installation Verification

Confirm the new ignition coil is securely mounted.
Confirm all electrical connectors are connected to the correct terminals.
Confirm the negative battery terminal is reconnected and tightened sufficiently without over-tightening.
Start the engine in Park and confirm it starts and idles normally.
If idle is normal, test-drive the vehicle and check for remaining misfire or drivability symptoms.

Troubleshooting

Spark plug and wire checks from the manual:
With the engine running, disconnect spark plug wires one at a time and observe engine-speed or roughness changes; the manual states that no significant change can indicate a bad spark plug.
The manual describes checking for spark by holding the end of a disconnected spark plug wire near a metal surface and looking or listening for a spark or cracking sound.
While the engine is cranked, check for spark at each spark plug wire; the manual states that no spark can indicate a dead wire.
Make sure battery, ignition, coil, and spark-plug wire connections are secure. Wiggle connections and retest if a loose connection is suspected.
Keep spark plug ends clean and free of dirt, oil, or grease; clean and retest before replacing a plug.
Inspect wires for cracked, cut, scraped, or burned insulation. Check boots and terminals for damage, corrosion, or poor contact.
Check for corrosion between the boot, spark plug, and ignition coil, and inspect the spark plug for discoloration or damage.
Inspect spring clips and wire retention at the distributor and spark plug ends to make sure connections are held securely.
Ignition coil failure can cause one or more cylinders to misfire, stuttering, sluggishness, and other drivability issues.

BDFHYK Ignition Coil Installation Guide

Q: What is included in this UF303 / 5019 kit?
A: The kit includes 5 UF303-style ignition coils and 5 5019 / LTR5GP platinum spark plugs.

Q: Which vehicles are listed for this kit?
A: It is listed for specified Chevrolet Colorado, GMC Canyon, Hummer H3, Isuzu i-350 and i-370 Inline-5 applications in the years shown on the product page.

Q: Which engines does this kit cover?
A: The listed applications use 3.5L or 3.7L Inline-5 engines. It is not a generic L4, V6 or V8 ignition kit.

Q: Which ignition coil references can I compare?
A: Compare UF303 and references such as 12568062 or 19300921 as applicable, plus the original connector, coil body and mounting.

Q: Is 5019 / LTR5GP an iridium spark plug?
A: No. 5019 / LTR5GP is a single-platinum spark plug reference with a ceramic insulator.

Q: Is this a genuine OEM GM or Isuzu part?
A: No. This is an OE-style aftermarket replacement kit. Confirm the original references and physical interfaces before installation.

Q: Does a misfire code prove an ignition coil has failed?
A: No. Wiring, connectors, injectors, fuel delivery, intake leaks, sensors, compression and mechanical timing can produce similar symptoms.

Q: Should all five coils and plugs be replaced together?
A: Replacement scope should follow diagnosis and the service plan. This kit supplies five coils and five plugs for a complete Inline-5 ignition service when appropriate.

Q: How should fitment be confirmed before ordering?
A: Confirm year, model, 3.5L or 3.7L Inline-5 engine, original connector and coil shape, printed references and the required spark plug number.

Q: What spark plug gap and torque should be used?
A: Use the exact GM or Isuzu service specification for the specific engine. Do not apply a generic value across these applications.

Q: What if rough idle or misfire remains after ignition service?
A: Continue diagnosis of wiring, injectors, fuel delivery, intake or vacuum leaks, sensors, compression and timing rather than assuming another ignition coil failure.

Returns & Refunds

We accept returns within 30 days of delivery for eligible items. If the product is unused and in original condition, you may request a return according to our refund policy. Full policy details: View Refund Policy . We recommend contacting our support team before initiating a return to ensure the fastest resolution.

Customer Support

If you purchased the wrong part, received an incompatible item, or need installation assistance, please contact us directly.

Email: service@bdfhyk.com

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Before vs After Replacement

Replacing worn ignition coils and spark plugs helps restore stable ignition and smoother engine performance.

BEFORE

Rough Idle & Engine Vibration Noticeable engine shaking while idling. Irregular exhaust flow may indicate unstable ignition performance.

AFTER

Fast Start & Stable Idle IMore consistent spark delivery reduces misfires and stabilizes idle speed.

BEFORE

Sluggish Acceleration Weak throttle response at lower RPM. Vehicle may feel underpowered.

AFTER

Enhanced Power Response Improved throttle response and smoother acceleration

BEFORE

Increased Fuel Consumption Poor combustion can lead to higher fuel usage.

AFTER

Improved Fuel Efficiency Optimized ignition supports more efficient combustion.

Performance improvements may vary depending on vehicle condition.

BDFHYK Ignition Coil UF303 and Iridium Plugs 5019 For Isuzu i-370 i-350,Chevy Colorado, Canyon, H3 3.5L 3.7L

Technical Specifications

Before vs After Replacement

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