Best Spark Plugs For Gmc Sierra: Compare Iridium and Platinum

#1 · Best Overall

1. Sixity Auto NGK Laser Iridium

• Core Material: Iridium
• Top Material Type: Ceramic
• Compatible with Vehicle Type: Truck

Best for: 2014–2020 Sierra 1500 V8 fit.

Why it ranks #1: Its listing explicitly fits GMC Sierra 1500 5.3L and 6.2L V8 engines and supplies eight genuine NGK Laser Iridium plugs.

Explicit compatibility with 2014–2020 GMC Sierra 1500 5.3L and 6.2L V8 engines makes this eight-plug NGK Laser Iridium set unusually straightforward to assess for those applications. Genuine NGK parts, original packaging, and hardware are included, supporting a direct-replacement parts purchase for the named trucks.

The listed Sierra 1500 fitment spans model years 2014 through 2020 and specifically names both 5.3L and 6.2L V8 engines, giving owners a concrete application range to check against their truck. Its eight-plug quantity supports a full set replacement. The listing identifies the plugs as genuine NGK Laser Iridium parts and includes original packaging and hardware, while describing them as direct replacement auto parts. Amazon Confirmed Fit is also referenced for checking the vehicle application.

Skip it if you own a Sierra 1500 from 2021 onward; NGK Iridium IX LTR5IX11 lists Chevrolet Silverado applications through 2024, not GMC fitment.

Choose this set if your Sierra 1500 is a listed 2014–2020 5.3L or 6.2L V8 and you want an eight-plug NGK replacement. Its stated GMC range does not extend beyond 2020.

Listed on Amazon as: 8 pc NGK Laser Iridium Spark Plugs for GMC Sierra 1500 5.3L 6.2L V8 2014-20

#2 · Older Sierra Fit

2. Sixity Auto NGK Iridium IX

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: Car, Truck

Best for: Older Sierra iridium replacement set.

Why it ranks #2: This eight-plug genuine NGK set explicitly lists Sierra 1500 4.8L, 5.3L, 6.0L, and 6.2L V8 applications.

NGK Iridium IX plugs with explicitly listed 1999–2013 GMC Sierra 1500 V8 coverage make this eight-piece set a direct candidate for owners of those model years. The application list names 4.8L, 5.3L, 6.0L, and 6.2L engines, while the specification supplies a 14 mm thread and 0.04-inch gap.

The stated Sierra 1500 range covers model years 1999–2013 and four V8 displacements, helping buyers compare the listing with their truck’s generation and engine. The eight-plug quantity supports a complete set replacement. NGK Iridium IX construction, a 14 mm thread, and a 0.04-inch gap provide product and installation details to check against the application. The listing also identifies genuine NGK parts and includes original packaging and hardware.

Skip it if you own a 2014–2020 Sierra 1500 5.3L or 6.2L V8; Sixity Auto’s NGK Laser Iridium set lists those newer Sierra applications.

Choose this set if your Sierra 1500 is a listed 1999–2013 V8 and you want eight NGK Iridium IX plugs with stated thread and gap details. Its listed GMC range does not include 2014-onward trucks.

Listed on Amazon as: 8 pc NGK Iridium IX Spark Plugs for GMC Sierra 1500 1999-2013

#3 · Platinum Twin-Tip

3. Sixity Auto DENSO Platinum TT

• Core Material: Platinum
• Top Material Type: Platinum
• Compatible with Vehicle Type: Car, Truck

Best for: 1999–2013 Sierra platinum set.

Why it ranks #3: The eight-pack specifically lists Sierra 1500 V8 applications and uses platinum center electrodes with a titanium-enhanced ground strap.

The listed 1999–2013 GMC Sierra 1500 coverage across 4.8L, 5.3L, 6.0L, and 6.2L V8 engines makes this eight-piece DENSO Platinum TT set a generation-specific option. Its twin-tip design pairs a platinum center electrode with a titanium-enhanced ground strap, with the listing linking a larger spark to faster starts.

The application list names Sierra 1500 model years 1999–2013 and four V8 displacements, helping owners narrow the fitment check to a defined generation and engine range. DENSO’s Platinum TT twin-tip design combines a platinum center electrode with a titanium-enhanced ground strap; the supplied description associates its larger spark with more power and fuel economy. A 1.1 mm platinum tip is also cited in the faster-starts feature. Eight plugs provide a set quantity for a full replacement.

Skip it if you drive a 2014–2020 Sierra 1500 5.3L or 6.2L V8; NGK Laser Iridium plugs explicitly list those model years and engines.

This DENSO set suits owners of a listed 1999–2013 Sierra 1500 V8 seeking eight platinum twin-tip plugs. Its stated GMC application range stops at 2013, so newer Sierra owners need a different listed fitment.

Listed on Amazon as: 8 pc DENSO Platinum TT Spark Plugs for GMC Sierra 1500 1999-2013

#4

4. Ozikutech Iridium Spark Plugs

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: for 4.8 5.3 5.7 6.0 6.2 6.6 8.1 LS V8

Best for: Broad GM LS V8 coverage.

Why it ranks #4: Its eight iridium plugs list GMC Sierra 1500 among a broad set of GM V8 applications and specify a 0.04-inch gap.

Eight iridium plugs with a 0.04-inch gap and a broad list of GM replacement numbers make this Ozikutech set relevant to buyers cross-checking older V8 applications. Its stated Sierra 1500 coverage includes 2000–2013 4.8L, 5.3L, 6.0L, and 6.2L engines, alongside a wide range of other GM vehicles.

The listing names Sierra 1500 applications from 2000 through 2013 and four V8 displacements, while also covering other Chevrolet and GMC models. That breadth can help buyers working from an OEM reference number: the supplied replacement list includes 41-110, 41-162, 41-985, 41-962, and several other numbers. The eight-piece quantity supports a full set, and the specified iridium material and 0.04-inch gap provide details for comparison during application checks.

Skip it if you have a 1999 Sierra 1500; DENSO Platinum TT lists that model year and the 4.8L V8 application.

Consider this set if your Sierra falls within its stated 2000–2013 V8 range and you are matching a listed replacement number. The supplied Sierra application does not include model year 1999.

Listed on Amazon as: 8 Pack Iridium Spark Plugs Replace OEM# 41-110 41-162 41-985 9602 19417055

#5 · Plugs and Wires

5. JDMSPEED Plugs and Wires

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: Truck, SUV

Best for: Plugs-and-wires replacement bundle.

Why it ranks #5: This bundle includes eight plugs and eight wires, and its compatibility description names GMC Sierra alongside several GM V8 applications.

A combined package of eight iridium spark plugs and eight M8-48322 spark plug wires is the practical distinction of this JDMSPEED bundle. It brings both ignition components into one replacement purchase for listed Chevy and GMC applications, while its extensive cross-reference list gives buyers several part numbers to compare.

The package includes eight 3186 spark plugs and eight M8-48322 wires, allowing a buyer replacing both listed component types to source them together. The product identifies the plugs as iridium and lists a 14×1.25 mm thread, while its cross-reference section names multiple plug and wire numbers. Compatibility details cover Chevy Silverado, Suburban, and Avalanche and GMC Yukon and Sierra applications with specified engine sizes in the title, but the supplied information does not clearly state a complete Sierra year range.

Skip it if you need a clearly stated Sierra year-and-engine range before ordering; NGK Laser Iridium plugs specify 2014–2020 Sierra 1500 5.3L and 6.2L V8 fitment.

Choose this bundle if you need both plugs and wires and its listed replacement references and vehicle details match your application. Its combined contents are useful only when you want both component types, and Sierra year coverage remains unclear.

Listed on Amazon as: Iridium Spark Plugs 3186 & Spark Plug Wires M8-48322 Replacement For Chevy Silverado Suburban Avalanche Replacement For GMC Yukon Sierra 5.3L 6.0L 6.2L Replace 12680072 12621258 7831 483227831 Red

#6

6. ACDelco GM Original Equipment 41-114

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: Car

Best for: Single-plug GM replacement.

Why it ranks #6: This GM original-equipment iridium plug offers a fine-wire electrode and a stated seven-year, unlimited-mile limited parts warranty, but is sold singly.

A fine-wire iridium electrode that helps burn away carbon deposits as they form gives this ACDelco GM Original Equipment plug a maintenance-oriented feature. Its suppressor seal also blocks radio frequencies that can affect vehicle electronics while metering spark energy, making it a focused individual replacement rather than a full-set purchase.

The iridium fine-wire electrode is specified to help burn away forming carbon deposits, while the small, efficient electrode design supports reliable cold starting and quick acceleration. A one-piece suppressor seal blocks radio frequencies that may affect vehicle electronics and meters spark energy for long electrode life; it also helps prevent combustion leakage. The GM Original Equipment description and ACDelco branding identify its replacement positioning. The key workflow consideration is quantity: this listing is for one plug, not a complete eight-plug set.

Skip it if you are replacing all eight plugs in one purchase; A-Premium APSP140 lists a pack of eight for specified Silverado V8 applications.

Pick this ACDelco plug when you need an individual GM Original Equipment-style iridium replacement and value its fine-wire and suppressor-seal features. Its single-unit quantity is the boundary for anyone planning a complete V8 set change.

Listed on Amazon as: ACDelco GM Original Equipment 41-114 (12622441) Iridium Spark Plug (Pack of 1)

#7

7. A-Premium Iridium Platinum

• Core Material: Platinum
• Top Material Type: Iridium
• Compatible with Vehicle Type: Truck

Best for: Eight-plug Silverado V8 pack.

Why it ranks #7: The eight-pack lists Silverado 1500 5.3L and 6.2L V8 applications, but the supplied fitment does not specifically name GMC Sierra.

A-Premium’s eight-plug pack explicitly lists Chevrolet Silverado 1500 2014–2023 5.3L and 6.2L V8 applications, giving those owners a clear fitment starting point. The plugs combine a platinum core with an iridium top and specify a 0.04-inch gap, useful details when comparing replacement specifications.

The stated Silverado 1500 coverage includes both 5.3L and 6.2L V8 engines for model years 2014–2023, making the application range more specific than a general truck listing. Eight plugs provide a full-set quantity. The platinum core and iridium top describe the electrode materials, while the 0.04-inch gap and size-14 thread offer concrete specifications for an installation comparison. Other listed vehicle applications include several V8 models, but the supplied truck fitment names Chevrolet rather than GMC Sierra.

Skip it if you require explicit GMC Sierra fitment; Sixity Auto’s NGK Laser Iridium set names 2014–2020 Sierra 1500 5.3L and 6.2L V8 applications.

This A-Premium pack suits buyers checking the specified 2014–2023 Chevrolet Silverado 1500 V8 applications and wanting eight plugs with a stated gap. Its supplied fitment does not identify GMC Sierra models.

Listed on Amazon as: A-Premium Iridium Platinum Spark Plugs Pack of 8, Fine Wire, V8 Engine

#8

8. NGK Iridium IX 4344

• Core Material: Iridium
• Top Material Type: Iridium
• Compatible with Vehicle Type: Chevrolet Silverado 1500 5.3L V8, Chevrolet…

Best for: Corrosion-resistant electrode focus.

Why it ranks #8: The eight-pack specifies iridium construction and a 1.1-millimeter gap, but its listed vehicle fitment names Chevrolet Silverado rather than GMC Sierra.

Corrosion-resistant center and ground electrodes are the defining feature of these NGK Iridium IX plugs, intended to minimize spark-gap growth and preserve ignitability. The eight-pack is explicitly listed for 2014–2024 Chevrolet Silverado 1500 5.3L and 6.2L V8 applications, making its stated truck fitment specific but not GMC Sierra-specific.

NGK connects the corrosion-resistant center and ground electrodes with reduced spark-gap growth and greater ignitability and spark efficiency, tying material properties to continued ignition performance. The listing also describes advanced electrodes as producing complete, efficient combustion and a stronger spark. Eight plugs provide a set quantity, while the 1.1 mm gap specification and 14 mm thread offer installation details to compare with the vehicle’s requirements. Its named applications are Chevrolet Silverado 1500 engines, not GMC Sierra models.

Skip it if you need a listing that explicitly names your GMC Sierra; NGK Laser Iridium plugs for 2014–2020 Sierra 1500 V8 models list GMC applications.

This set fits buyers shopping for the listed 2014–2024 Chevrolet Silverado 1500 5.3L or 6.2L V8 applications and prioritizing corrosion-resistant electrodes. Its supplied fitment does not identify GMC Sierra models.

Listed on Amazon as: NGK Iridium IX Spark Plugs Compatible with Chevrolet Silverado 1500 5.3L 6.2L V8 2014-2024 (8 Pack)

#9

9. ACDelco Professional Platinum 41-962

• Core Material: Platinum
• Top Material Type: Nickel
• Compatible with Vehicle Type: Car

Best for: Eight-plug platinum replacement set.

Why it ranks #9: The eight-pack offers double platinum electrode pads and a copper core, but the listing provides no specific Sierra engine fitment.

A double-platinum pad on both the center and ground electrodes gives this eight-plug ACDelco set its durability focus, helping maintain consistent voltage demands while reducing wear on the ignition system. Its one-piece suppressor seal also targets radio-frequency and engine interference, a useful combination for buyers prioritizing ignition protection.

The double-platinum electrode pads support durability and consistent voltage demands, which can help limit wear across the ignition system. A fired-in suppressor seal blends three glass types to form a gas-tight barrier; its listed functions include reducing radio-frequency and engine interference, regulating spark energy, and protecting against compression pressure. The pure copper core helps keep electrode temperature cooler, supporting durability. The eight-plug pack suits a full replacement, while the supplied vehicle specification identifies cars rather than a specific Sierra fitment.

Skip it if you need an explicitly listed Sierra application; NGK TR5GP lists truck compatibility, though its supplied data does not specify Sierra fitment.

Choose this ACDelco set if you want eight plugs with double-platinum electrodes, a suppressor seal, and a copper core. The listing does not name a GMC Sierra application, so treat vehicle-specific fitment as an important boundary.

Listed on Amazon as: ACDelco 41-962 Professional Platinum Spark Plug, (8)

#10

10. NGK G-Power Platinum TR5GP

• Core Material: Platinum
• Top Material Type: Platinum
• Compatible with Vehicle Type: Car, Truck

Best for: Wide-heat-range platinum set.

Why it ranks #10: This genuine NGK eight-pack has a triple-gasket seal and wide heat-range design, but the supplied listing does not establish GMC Sierra fitment.

NGK’s G-Power platinum plugs are specified to operate over a wider heat range than ordinary plugs, a feature that helps buyers seeking performance across varied engine conditions. The eight-piece set also resists carbon buildup and pre-ignition, pairing heat-range flexibility with combustion-related protection.

The wider operating heat range is the central practical distinction: it gives the plug a broader specified operating window than ordinary plugs. NGK also says the design resists carbon buildup and pre-ignition, addressing two concerns relevant to ignition operation. A patented triple-gasket sealing process is intended to eliminate combustion-gas leakage. The genuine eight-pack provides a complete set of plugs, and the specifications list car and truck compatibility with a 14×1.25 mm thread; they do not identify a particular GMC Sierra year or engine.

Skip it if you want a listing naming your Sierra generation and engine; NGK Laser Iridium plugs for 2014–2020 Sierra 1500 5.3L or 6.2L V8 provide that specificity.

This set suits buyers seeking NGK platinum plugs with a wider stated heat range and triple-gasket sealing. Its listing covers cars and trucks broadly, so Sierra owners should weigh the missing year-and-engine application detail before choosing.

Listed on Amazon as: NGK # 3186 G-Power Platinum Spark Plugs TR5GP – 8 PCSNEW